i-ACCURATE
INSTALLATION MANUAL - USER AND MAINTENANCE
Precision air-conditioners
i-ACCURATE
i-AX Direct Expansion
i-AW
i-AD
i-AT
i-AF
Air Cooled
Direct Expansion
Water Cooled
Dual Fluid
Air Cooled
Dual Fluid
Water Cooled
Free Cooling
Water Cooled
50/60Hz range
EN
frame 2:
12-18
frame 3:
20-29
frame 4:
50
frame 5:
70
frame 6:
90
frame 7:
130-150
INDEX
Documents
4
Refrigerant connections
37
Direct expansion unit configuration
4
Oil separator
38
General characteristics
4
Volume
39
Air flows
9
Condensate drain a
40
Rating plate
10
Electrical connections
40
Technical data
10
Minimum cross-sections of the power supply cables
41
Hot water re-heating
15
Electrical specifications
41
Reheat coil hot gas
15
Electrical connection of the outdoor air-cooled condenser
Accessing the main components
15
i-BRE/BRE and/or the outdoor dry cooler i-BDC/BDC
46
Transport and handling
16
Vaacum and charge
47
Dimensions and weight
17
Operation and control
48
Positioning the air-conditioner
21
Instruments and alarms
49
Operating space
21
Calibrating the control and safety devices
50
Operating limits
22
Calibrating the pressure control valve
50
Optional base moulding (over units)
22
Calibrating the air flow sensor
51
Air distribution (under units)
23
Calibrating the dirty filter sensor
51
Intake plenum (under units)
23
Temperature and humidity probe
52
Discharge plenum (over units)
23
Servomotor and hot water valve
52
Motor-driven damper (over/under units)
24
Electric heaters
57
Front outlet plenum (over units)
24
Humidifier
57
Front outlet base moulding (under units)
24
Humidifier power supply
59
Soundproof suction or outlet plenum
25
Humidifier and condensate drain
59
Direct free cooling plenum (under units)
25
Condensate drain pump and humidifier drain pumpe
60
Direct free cooling base (over units)
26
Std condensate drain pump (low water temperature)
60
Direct free cooling connection kit (under/over units)
26
Condensate drain pump for high water temp.
61
Optinal air filter
27
(humidifier)
Optional Fresh airo
27
Double power supply with automatic switching
62
Position and diameter of the water connections
28
Maintenance
63
Water connections
32
Dismantling
63
Connection to brazed plate condenser i-AW-i-AT-i-AF
32
Troubleshooting
64
Correction factors
32
Air condenser: suggested installation
36
Liability disclaimer
This bulletin refers to standard executions, in particular for dimension, weight, electric, hydraulic, aeraulic and refrigerant connections
(whereas applicable). Contact Climaveneta Commercial Office for further drawings and schemes.
Climaveneta declines any liability derived from the bulletin’s use.
This bulletin is of exclusive property of Climaveneta, and all forms of copy are prohibited.
The data contained herein are subject to variation without notice.
In some parts of this manual, the following symbols are used:
WARNING = for actions that require special care and
suitable preparation
Specialist personnel (electrician)
Person with in-depth knowledge and experience such as to
be able to recognise risks and avoid dangers that may derive
from electricity (IEV 826-09-01).
PROHIBITED = for actions that absolutely MUST NOT
be performed
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
3
DOCUMENTS
DOCUMENTS ENCLOSED WITH THE UNIT
Each unit is delivered complete with the following documents:
• Air-conditioner installation - user and maintenance manual;
• Instruction manual for the microprocessor controller;
• Wiring diagram;
• List of spare parts;
• CE declaration with list of European directives and standards
that the unit is compliant with;
• Warranty conditions.
Description
A X O
2 9
Option 1
MODELS
Option 2
AIR FLOW
Option 3
CAPACITY
Version
Capacity
Models
Options
DIRECT EXPANSION UNIT CONFIGURATION
BASIC
i-AX
i-AW
i-AD
i-AT
i-AF
O
U
12
18
20
29
50
70
90
130
10
BASIC
MOD
Option 4
VERSION
Direct expansion - air cooled
Direct expansion - water cooled
Dual Fluid - air cooled
Dual Fluid - water cooled
Free Cooling - water cooled
Over Flow
Under Flow
12 kw
18 kw
20 kw
29 kw
50 kw
70 kw
90kw
130kw
150kw
BASIC units with EC fan speed control on the i-BRE/i- BDC
i-AX_i-AD units with EC fan speed control function on the i-BRE/i-BDC and
AC fan speed control of the BRE/BDC
MOD.A
i-AW_i-AT_i-AF_ units with EC fan speed control function on the i-BRE/i-BDC
and with AC fan speed control on the BRE/BDC
MOD.B
i-AW_i-AT Units with condensing pressure control by pressure control valve
LT
LT units for low outside temp. (-45°C) with EC fan speed control function on
the i-BRE and with AC fan speed control on the BRE/BDC
GENERAL CHARACTERISTICS
DESCRIPTION OF THE UNIT
Ductable precision air-conditioners with capacities from 4 to 150
kW for vertical installation, cooling only, with the possibility of
electric or hot water post-heating, humidifier and dehumidifier
option for the precision control of the temperature-humidity
conditions. Ideal for air-conditioning technological environments,
server rooms and data processing centres, and technological
applications in general. The inverter-driven compressor allows the
capacity delivered by the unit to be modulated according to the
actual requirements of the load, ensuring high efficiency at part
loads, optimising power consumption and eliminating peak startup current.
The packaged precision air-conditioners operate with R410A
refrigerant and are suitable for indoor installation.
4
EN
The units conform to the essential requisites established in EC
directive 2006/42/CE.
They are factory tested and on site installation is limited to the
refrigerant and electrical connections.
STRUCTURE
Base made from painted galvanised RAL7016 steel plate; frame
complete with service panels that allow the unit to operate correctly during maintenance operations.
The cosmetic panelling, coated with an innovative double layer of
plastic, is lined on the inside with special soundproofing material.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
COMPRESSORS
INVERTER-DRIVEN HERMETIC SCROLL and ON/OFF compressors, complete with thermal protector. Fitted on rubber vibration
dampers and complete with oil charge.
FANS
EC RADIAL FAN, STANDARD VERSION
Fan with one-sided intake and backward curved blades, brushless
motor with electronic commutation for excellent performance in
terms of static pressure, low power consumption and reduced
noise. Speed control is modulating, set from the user terminal
based on the correct required static pressure setting.
In the STANDARD version with low residual pressure (20- 100
Pa) at rated flow.
EC RADIAL FAN, HP VERSION
Fan with one-sided intake and backward curved blades, brushless
motor with electronic commutation for excellent performance in
terms of static pressure, low power consumption and reduced
noise. Speed control is modulating, set from the user terminal
based on the correct required static pressure setting.
In the HP version with high residual pressure at rated flow.
FILTER
Pleated filters, supported by a frame, with protective metal mesh,
and regenerable polyester fibre filtering media treated with synthetic resins. G2/G4 efficiency according to the CEN-EN 779
standard with average separation efficiency 90.1% ASHRAE (G4).
The filter is flame retardant
AIR HEAT EXCHANGER
Finned coil, large front surface, made from copper tubes expanded mechanically onto aluminium fins with a high heat exchange
surface. Hydrophilic treatment to assist the drainage of condensate. The coil, installed upstream of the fans for perfect air distribution, is fitted with a stainless steel pan with hose to drain the
condensate.
ELECTRICAL PANEL
Built and wired in compliance with the IEC 204-1/EN60204-1
standards, complete with contactor and overload protection for
the compressors and fans, disconnecting switch with door interlock safety device.
CONTROL
The microprocessor, by managing the compressor activation
times, controls the cooling capacity and the operating alarms, with
the possibility of connection to supervisor systems.
AIR FLOW SENSOR
Activates an alarm in the event of insufficient air flow.
ELECTRIC POST-HEATING (versions R or T)
Finned aluminium heaters complete with safety thermostat to cut
off power and activate an alarm in the event of overheating.
The electric heaters are used to:
- Heat the air so as to reach the set point
- Reheat the air during dehumidification operation, bringing the
air temperature back to the set point
REHEATING WITH HOT GAS COIL
Available as an alternative to the hot water coil, this is placed
downstream of the evaporator coil, and is used during dehumidification operation to reheat the air using some of the heat
exchanged at the condenser, bringing the temperature back to the
set point with CONSIDERABLE energy savings.
The option includes a finned coil heat exchanger made from copper tubes expanded mechanically onto aluminium fins with high
heat exchange area, and an on/off valve managed by the EVOLUTION+ controller, which activates the reheating circuit.
The hot gas coil can be used in combination with the electric
heaters.
IMMERSED ELECTRODE HUMIDIFIER (versions H or T)
Modulating steam production and automatic control of the salt
concentration in the boiler to allow the use of untreated water.
MICROPROCESSOR CONTROL SYSTEM
For the control of the ambient parameters and the management
of the unit monitoring and control functions (compliant with EEC
directive 89/336).
DIRECT EXPANSION MODELS
HERMETIC SCROLL COMPRESSOR with high energy efficiency
and low noise level, and inbuilt thermal overload protection.
REFRIGERANT CIRCUIT including:
- liquid receiver;
- dewatering filter and flow indicator;
- electronic expansion valve;
- oil separator (in the circuit with inverter-driven compressor)
- external connections with cocks;
- low and high pressure switches (with manual reset).
WATER CONDENSER (water-cooled models) with braze welded
stainless steel plates.
AIR FLOW CONFIGURATION
O - OVER: air delivery versus top
U - UNDER: air delivery versus bottom
VERSIONS
BASIC
air- or water-cooled units with EC fan speed
control function on i-BRE/i-BDC models
MOD - MOD.A air-cooled (MOD) or water-cooled units
(MOD.A) with EC fan speed control function on
i-BRE/i-BDC models and with AC fan speed control on BRE/BDC models
LT
air-cooled units for low temperatures with EC
fan speed control function on i-BRE model and
AC fan speed control on BRE model
MOD.B
water-cooled unit for applications with well
water, including condenser control with pressure
control valve
HEATING WITH HOT WATER COIL
The coil, complete with water circuit air vent valve, is located
downstream of the evaporator coil.
The option is supplied complete with modulating 3-way valve with
servomotor, managed by the EVOLUTION+ controller.
Finned coil heat exchanger made from copper tubes expanded
mechanically onto aluminium fins with high heat exchange area.
The hot water coil can either be an alternative to or in combination with the electric heaters, and is used to:
- Heat the air so as to reach the set point.
- Reheat the air during dehumidification operation, bringing the
air temperature back to the set point.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
5
REFRIGERANT CIRCUIT
All models have a single refrigerant circuit, and in some cases,
depending on the model, two circuits - 1 x ON/OFF + 1 x
INVERTER or 2 x ON/OFF + 1 x INVERTER (mod.130-150).
Each refrigerant circuit includes the compressor and an electronic
thermostatic valve to ensure stable superheat.
A liquid indicator is fitted before the thermostatic valve to show
gas charge. The refrigerant circuit is also fitted with an oil separator at the compressor discharge to ensure perfect compressor
lubrication, even at minimum speed. A dewatering filter is
installed on the liquid line so as to keep the circuit clean and free
of dirt. The refrigerant circuit features safety pressure switches
for both high and low pressure.
The low pressure switch has automatic reset, while for safety seasons the high pressure switch requires manual reset. The compressor pumps the hot refrigerant gas into the condenser.
The liquid refrigerant then flows to a liquid receiver (fitted with
safety valve) installed on the indoor unit, to ensure a constant
flow of refrigerant to the thermostatic valve and subsequently the
evaporator. Here the liquid refrigerant absorbs the heat from the
environment and changes state, becoming a gas, then returning to
the compressor: the cycle is then repeated.
The units are fitted with scroll compressors that feature nonreturn valves to prevent liquid from migrating from the outdoor
condenser during summer, and unwanted refrigerant flow during
start-up.
AIR-COOLED DIRECT EXPANSION UNIT
- VERSION i-AX
The i-AX series units use air as the cooling fluid, and are therefore combined with an outdoor air-cooled condenser (supplied
separately). The BASIC version includes the condenser control
function with EC fan speed control in combination with i-BRE
remote condensers. The MODULATING version features speed
control for the fans on the BRE condenser, in this case axial-flow
fans with asynchronous motors, so as to maintain correct refrigerant condensing pressure.
The i-AX units are supplied with valves for closing and isolating
the refrigerant circuit and to assist service operations.
A second non-return valve, to be fitted by the installer at the condenser outlet on the liquid line, is recommended during operation
in winter, to prevent migration of the refrigerant charge from the
liquid receiver to the outdoor condenser, with consequent low
pressure alarms.
The i-AX units are supplied as standard with EC radial fans in the
standard version.
Note 1: unit and outdoor condensers supplied separately
Note 2: the indoor unit is delivered charged with nitrogen at
near-atmospheric pressure.
The outdoor condenser, on the other hand, is supplied pressurised with dry air (around 3 bars)
Note 3: the customer is responsible for properly making the
connections between the indoor and outdoor units, as clearly
described in this manual, and for ensuring the required gas and oil
charge, where necessary.
WATER-COOLED DIRECT EXPANSION UNIT
- VERSION i-AW
The i-AW series units use water as the cooling fluid, therefore
each refrigerant circuit is combined with a plate heat exchanger
installed on the unit, suitably sized to ensure minimum water side
pressure drop and consequently reduce the power consumption
of the water pump.
Remember that the units are supplied without the system circulating pump.
The i-AW units are supplied as standard with EC radial fans in the
standard version.
Water-cooled condenser
The units are fitted with an internal braze welded stainless steel
plate heat exchanger.
The units for applications with well water are supplied with a
pressure control valve to manage the condensing pressure.
This circuit works with primary water or with a closed circuit
connected to an outdoor dry cooler or cooling tower.
For “closed” circuits, it’s recommended to use water mixed with
antifreeze to prevent ice from forming in winter and consequently
damaging the system: see the installation manual for the calculation of the percentage of antifreeze to use.
The BDC (axial-flow fans with asynchronous motor) and i-BDC
Dry Coolers (axial-flow fans with EC motor) are supplied as standard accessories.
The antifreeze and fluid circulating pump are generally supplied by
other manufacturers.
For “open” circuits mechanical filters must be used to trap impurities and prevent blockage of the braze-welded plate heat
exchanger.
To reduce energy consumption (pump), it’s suggested to use a
valve to close the circuit when the indoor unit is off.
Note 1: the i-AW water-cooled indoor units come with the
refrigerant circuit completely charged and factory-tested before
delivery.
Outdoor air-cooled condenser
The indoor unit can be connected to different types of BRE (axial-flow fans with asynchronous motor) and i-BRE outdoor condensers (axial-flow fans with EC motor), standard or low noise
version, and with special coil treatment.
For more specific information see the manual on the outdoor aircooled condensers.
i-AX - air cooled
6
EN
i-AW - water cooled
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
FREECOOLING UNITS – VERSION i-AF
The i-AF series units, in favourable outside conditions, can use the
cooling water to maintain the set environmental conditions without the need for mechanical cooling using the compressor, or to
reduce the cooling load.
The i-AF series units use water as the cooling fluid, therefore
each refrigerant circuit is combined with a plate heat exchanger
installed on the unit, suitably sized to ensure minimum water side
pressure drop and consequently reduce power consumption of
the water pump.
The i-AF units are fitted as standard with EC radial fans in the
standard version.
Water-cooled condenser
Each unit is fitted with one (single-circuit units) or two (two-circuit units) braze welded stainless steel plate condensers.
Each refrigerant circuit features an automatic bypass valve to control minimum condensing pressure during operation in FC mode.
The units generally work in closed circuits, with outdoor dry
coolers, cooled by the outside air.
To avoid ice formation, it’s recommended to always use a glycol
mixture as the fluid inside the closed circuit, in the percentages
described in this manual based on the average minimum temperature reached in the installation site in winter.
The BDC (axial-flow fans with asynchronous motor) and i-BDC
Dry Coolers (axial-flow fans with EC motor) are supplied as standard accessories.
The antifreeze and fluid circulating pump are generally supplied by
other manufacturers.
For “open” circuits mechanical filters must be used to trap impurities and prevent blockage of the braze-welded plate heat
exchanger.
To reduce energy consumption (pump), it’s suggested to use a
valve to close the circuit when the indoor unit is off.
Water circuit
The unit is fitted with a modulating 3-way valve to control the
flow of cooling fluid to the indoor heat exchanger for freecooling.
The opening and closing signal is generated and managed completely by the electronic controller on the air-conditioner so as to
maintain the desired conditions and ensure maximum energy savings.
DUAL FLUID UNITS – VERSION i-AD (air-cooled) &
i-AT (water-cooled )
The i-AD and i-AT series units feature two different cooling systems, which cannot be active at the same time.
One primary chilled water system (CW) provided by a chiller
installed on site, and a secondary direct expansion system (DX),
which also acts as backup.
The activation set points of these two circuits can be seen in the
User terminal manual.
The i-AD units are fitted as standard with EC radial fans in the
standard version.
Version i-AD (air-cooled)
The i-AX series units use air as the cooling fluid, and are therefore combined with an outdoor air-cooled condenser (supplied
separately).
The STD version includes the condenser control function with
EC fan speed control in combination with i-BRE remote condensers.
The MODULATING version features condenser fan speed control, so as to maintain correct refrigerant condensing pressure.
The i-AD units are supplied with valves for closing and isolating
the refrigerant circuit and to assist service operations.
A second non-return valve, to be fitted by the installer at the condenser outlet on the liquid line, is recommended during operation
in winter, to prevent migration of the refrigerant charge from the
liquid receiver to the outdoor condenser, with consequent low
pressure alarms.
Outdoor air-cooled condenser
The indoor unit can be connected to different types of BRE (axial-flow fans with asynchronous motor) and i-BRE outdoor condensers (axial-flow fans with EC motor), standard or low noise
version, and with special coil treatment.
For more specific information see the manual on the outdoor aircooled condensers.
Note 1: unit and outdoor condensers supplied separately
Note 2: the indoor unit is delivered charged with nitrogen at
near-atmospheric pressure.
The outdoor condenser, on the other hand, is supplied pressurised with dry air (around 3 bars)
Note 3: the customer is responsible for properly making the
connections between the indoor and outdoor units, as clearly
described in this manual, and for ensuring the required gas and oil
charge, where necessary.
Water circuit
The unit is fitted with a modulating 3-way valve to control the
flow of cooling fluid to the indoor heat exchanger and maintain
the desired conditions.
i-AF - water cooled
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
i-AD - air cooled
EN
7
Version i-AT (water-cooled)
The i-AT series units use water as the cooling fluid, therefore
each refrigerant circuit is combined with a plate heat exchanger
installed on the unit, suitably sized to ensure minimum water side
pressure drop and consequently reduce the power consumption
of the water pump.
Remember that the units are supplied without the system circulating pump.
The i-AT units are fitted as standard with EC radial fans in the
standard version.
Water-cooled condenser
Each unit is fitted with one (single-circuit units) or two (two-circuit units) braze welded stainless steel plate condensers.
The units for applications with well water are supplied with a
pressure control valve for managing the condensing pressure.
The units generally work in closed circuits, with outdoor dry
coolers, cooled by the outside air.
To avoid ice formation, it’s recommended to always use a glycol
mixture as the fluid inside the closed circuit, in the percentages
described in this manual according to the average minimum temperature reached in the installation site in winter.
The BDC (axial-flow fans with asynchronous motor) and i-BDC
Dry Coolers (axial-flow fans with EC motor) are supplied as
standard accessories.
The antifreeze and fluid circulating pump are generally supplied by
other manufacturers.
For “open” circuits mechanical filters must be used to trap impurities and prevent blockage of the braze-welded plate heat
exchanger.
To reduce energy consumption (pump), it’s suggested to use a
valve to close the circuit when the indoor unit is off.
Water circuit
The unit is fitted with a modulating 3-way valve to control the
flow of cooling fluid to the indoor heat exchanger and maintain
the desired conditions.
Remember that the units are supplied without the system circulating pump..
i-AT - water cooled
8
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
AIR FLOWS
The i-ACCURATE air-conditioners are available in different
configurations, based on the air intake and outlet positions; the
main distinction is between OVER and UNDER units.
The versions defined as OVER with air outlet from the top gen-
erally have the air intake at the front, rear and/or from the bottom, as required by the customer, and the air outlet from the top
of the unit, in ducts, false-ceilings, or from outlet plenums at the
front.
i-AXO - i-AWO - i-ADO
i-ATO - i-AFO
fig. 1
1
OVER units with intake from the front and outlet plenum
fig. 2
2
fig. 4
fig. 3
3
OVER units with intake from under the floor and outlet
from the top
OVER units with intake from the front and outlet from the top
4
OVER units with intake from the rear and outlet from the top.
(not available on models 130-150, use base moulding with
grills)
The versions defined as UNDER with air outlet from under the floor have the air intake through the top of the unit directly from the environment, or via ducts and/or intake plenums.
i-AXU - i-AWU - i-ADU
i-ATU - i-AFU
fig. 5
fig. 6
5
UNDER units with intake from the top and front outlet
plenum.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
6
UNDER units with intake from the top and outlet under
the floor
EN
9
RATING PLATE
The air-conditioner rating plate is positioned on a panel inside the
unit, and provides the following information:
- Model and serial number of the unit;
- Power supply (voltage, phases and frequency);
- Power input of the unit and the individual components;
- Current input of the unit and the individual components: OA
(Operating current), FLA (Full load current) and LRA (Locked
rotor current);
- Settings of the pressure switches in the refrigerant circuit (HP
and LP);
- Type of refrigerant (R410A);
- Charge or pre-charge in each refrigerant circuit (i-AW - i-AT i-AF )
Mod.151 rev.03
Type
Modello
Model
Modèle
Modelo
Typ
Item
Articolo
Einzelteil
Article
Artículo
Produktkodning
Serial number
Matricola unità
Seriennummer
Matricule unité
Matricula unidad
Serienummer
Manufact. year
Anno di costruz.
Baujahr
Année construction
Año de costrucción
Tillverkningsår
Operating weight
Peso in funzionam.
Betriebsgewicht
Poids en fonction.
Peso en funcionam
Driftsvikt
Refrigerant
Gas refrigerante
Kältemittel
Gaz réfrigérant
Gas refrigerante
Köldmedium
Refr. charge
Carica refrigerante
Füllgewicht
Q.té gaz réfrig.
Carga refrigerante
Köldmediefyllning
ELECTRICAL SUPPLY
Auxiliary
Main
F.L.I.
F.L.A.
L.R.A.
kW
A
A
MAXIMUM ALLOWABLE PRESSURE (PS)
Gas circuit: HP=
Water circuit:
MPa
LP=
MPa
MPa
Maximum transport and storage temperature:
°C
Manual n°:
Wiring Diagrams:
rev.
36061 BASSANO DEL GRAPPA (VI)
ITALIA - via SARSON, 57/C
Tel.+39 0424 509500 Fax+39 0424 509509
e-mail: [email protected]
TECHNICAL DATA
ACCURATE - i-AX Air-cooled direct expansion unit
Model
12
18
Frame
F2
No. of circuits / no. of compressors
1/1
1/1
Refrigerant
R410A
R410A
Rated air flow-rate
mc/h
3500
4900
Power supply
V/Ph/Hz
230/1/50
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
kW
11,1
16,60
Gross sensible capacity (1)
kW
10,6
16,60
SHR (1)
0,95
1,00
Compressor power consumption
kW
2,54
4,09
Power cons. with std. EC radial fans
kW
0,35
0,84
Power cons. with HP EC radial fans
kW
0,27
0,47
Minimum speed
Gross total capacity (1)
kW
4,34
6,27
Gross sensible capacity (1)
kW
4,34
6,27
SHR (1)
1,00
1,00
Compressor power consumption
kW
0,88
1,24
Power supply
V/Ph/Hz
n.a
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
kW
/
16,6
Gross sensible capacity (1)
kW
/
16,6
SHR (1)
/
1,00
Compressor power consumption
kW
/
4,09
Power cons. with std. EC radial fans
kW
/
0,84
Power cons. with HP EC radial fans
kW
/
0,47
Minimum speed
Gross total capacity (1)
kW
/
6,27
Gross sensible capacity (1)
kW
/
6,27
SHR (1)
/
1,00
Compressor power consumption
kW
/
1,24
FANS
No. of std. EC radial fans
2
2
No. of HP EC radial fans
2
2
Sound pressure level (5)
dB(A)
49
53
REFRIGERANT CONNECTIONS
IN - LIQ
12
12
Refrigerant connections (ODS Ø)
OUT-GAS
12
18
HUMIDIFIER
Capacity
kg/h
3
5
ELECTRIC HEATERS
Steps
3
3
Heating capacity
kW
4
8
DIMENSIONS
Length
mm
1000
Depth
mm
500
Height
mm
1980
OUTDOOR UNIT COMBINATIONS
i-BRE remote condenser
014m
027m
BRE remote condenser
014m
027m
TECHNICAL DATA
20
29
F3
50
70
F4
F5
1/1
2/2
R410A
R410A
13500
19000
400/3N/50
90
F6
2/2
R410A
25000
130
150
2/3
R410A
30000
2/3
R410A
30000
55,00
51,10
0,93
13,20
3,20
3,13
86,50
85,50
0,99
20,30
6,10
6,72
135,9
116,2
0,86
30,80
6,90
151,8
124,1
0,82
35,00
6,90
24,30
24,30
1,00
4,30
24,70
24,70
1,00
4,60
24,70
24,70
1,00
4,60
F7
1/1
R410A
6500
1/1
R410A
8000
19,32
19,32
1,00
4,44
1,35
0,89
28,07
28,07
1,00
7,14
1,80
1,51
7,24
7,24
1,00
1,33
10,62
10,62
1,00
1,96
19,3
19,3
1,00
4,44
1,35
0,89
28,1
28,1
1,00
7,14
1,80
1,51
55,0
51,1
0,93
13,20
3,20
3,13
71,5
68,7
0,96
16,29
4,50
5,11
84,9
83,8
0,99
19,83
6,10
6,72
139,0
117,6
0,85
31,94
6,90
147,7
121,9
0,82
33,97
6,90
7,24
7,24
1,00
1,33
10,62
10,62
1,00
1,96
25,39
25,39
1,00
4,31
23,60
23,60
1,00
4,40
24,30
24,30
1,00
4,30
24,70
24,70
1,00
4,60
24,70
24,70
1,00
4,60
1
1
56
1
1
60
2
2
64
3
3
67
3
4
67
3
69
3
69
16
22
16
22
16
22
16
22
18
22
22
35
22
35
5
5
5
8
8
8
8
3
9
3
9
3
15
3
18
3
18
3
24
3
24
1550
790
1980
2100
790
1980
2650
790
1980
065m
065m
100b
100b
116b
116b
1000
790
1980
027m
027m
044m
044m
70,20
68,10
0,97
15,80
4,50
5,11
25,39
23,60
25,39
23,60
1,00
1,00
4,31
4,40
460/3/60 - 380/3/60
2650
890
2180
190b
190b
190b
190b
1 - Inside air 24°C-50%, Cond. temperature 45°C - ESP 20 Pa
5 - measured at a height of 1.5 m and 2 m from the front of the unit in free field
10
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
ACCURATE - i-AW Water-cooled direct expansion unit
Model
12
18
Frame
F2
No. of circuits / no. of compressors
1/1
1/1
Refrigerant
R410A
R410A
Rated air flow-rate
mc/h
3500
4900
Power supply
V/Ph/Hz
230/1/50
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
kW
11,7
17,4
Gross sensible capacity (1)
kW
10,9
17
SHR (1)
0,93
0,98
Compressor power consumption
kW
2,12
3,68
Assorbimento con vent.radiali EC BASE
kW
0,35
0,84
Power cons. with HP EC radial fans
kW
0,27
0,47
Minimum speed
Gross total capacity (1)
kW
4,78
7,27
Gross sensible capacity (1)
kW
4,78
7,27
SHR (1)
1,00
1,00
Compressor power consumption
kW
0,61
1,24
Power supply
V/Ph/Hz
n.a
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
kW
/
17,4
Gross sensible capacity (1)
kW
/
17,0
SHR (1)
/
0,98
Compressor power consumption
kW
/
3,68
Power cons. with std. EC radial fans
kW
/
0,84
Power cons. with HP EC radial fans
kW
/
0,47
Minimum speed
Gross total capacity (1)
kW
/
7,27
Gross sensible capacity (1)
kW
/
7,27
SHR (1)
/
1,00
Compressor power consumption
kW
/
0,96
FANS
No. of std. EC radial fans
2
2
No. of HP EC radial fans
2
2
Sound pressure level (5)
dB(A)
49
53
PLATE CONDENSER
Type
Number
1
1
Water content
0,8
3,9
Water flow-rate (1)
2400
3650
Pressure drop Dp (1)
1
6
REFRIGERANT CONNECTIONS
IN
1" 1/4 M
1" 1/4 M
Condenser water connections *
OUT
1" 1/4 M
1" 1/4 M
HUMIDIFIER
Capacity
kg/h
3
5
ELECTRIC HEATERS
Steps
3
3
Heating capacity
kW
4
8
DIMENSIONS
Length
mm
1000
Depth
mm
500
Height
mm
1980
OUTDOOR UNIT COMBINATIONS
i-BDC remote condenser
030m
030m
BDC remote condenser
030m
030m
20
29
F3
50
70
F4
F5
1/1
2/2
R410A
R410A
13500
19000
400/3N/50
90
F6
2/2
R410A
25000
130
150
2/3
R410A
30000
2/3
R410A
30000
56,72
51,52
0,91
12,08
3,20
3,13
93,30
90,50
0,97
18,60
6,10
6,72
142,5
118,9
0,83
27,60
6,90
159,1
127,6
0,80
31,70
6,90
27,90
27,90
1,00
3,00
27,50
26,70
0,97
3,30
27,50
26,70
0,97
3,30
F7
1/1
R410A
6500
1/1
R410A
8000
20,46
25,41
1,24
3,86
1,35
0,89
29,3
28,6
0,98
6,38
1,80
1,51
7,88
7,88
1,00
1,11
12,33
12,33
1,00
1,96
20,5
20,4
1,00
3,86
1,35
0,89
29,3
28,6
0,98
6,38
1,80
1,51
56,7
51,5
0,91
12,08
3,20
3,13
75,0
70,7
0,94
14,16
4,50
5,11
92,4
89,4
0,97
17,71
6,10
6,72
145,2
120,1
0,83
28,78
6,90
154,4
125,9
0,82
30,92
6,90
7,88
7,88
1,00
1,11
12,32
12,32
1,00
1,43
27,28
27,28
1,00
3,20
25,07
25,07
1,00
3,45
27,91
27,91
1,00
2,98
27,47
26,67
0,97
3,26
27,46
26,65
0,97
3,26
1
1
56
1
1
60
2
2
64
3
3
67
3
4
67
3
69
3
69
1
8,5
19400
36
1
12
29500
27
1
12
33000
39
73,90
70,20
0,95
13,60
4,50
5,11
27,30
25,30
27,30
25,30
1,00
1,00
3,20
3,30
460/3/60 - 380/3/60
AISI316 plate heat exchanger
1
1
2
3
5
2x3,8
6180
11900
15200
23
54
26
1
2,5
4200
10
1" 1/4 M
1" 1/4 M
1" 1/4 M
1" 1/4 M
1" 1/4 M
1" 1/4 M
1" 1/4 M
1" 1/4 M
2"M
2"M
2" 1/2M
2" 1/2M
2" 1/2M
2" 1/2M
5
5
5
8
8
8
8
3
9
3
9
3
15
3
18
3
18
3
24
3
24
1550
790
1980
2100
790
1980
2650
790
1980
062m
062m
092m
092m
123m
123m
1000
790
1980
030m
030m
039m
039m
2650
890
2180
190m
190m
190m
190m
1 - Inside air 24°C-50%, water 30-35°C - ESP 20 Pa
5 - measured at a height of 1.5 m and 2 m from the front of the unit in free field
*WARNING,THE DIAMETERS OF THE CONNECTION LINES BETWEEN THE INDOOR UNIT AND DRY COOLER MUST BE SIZED
BY THE INSTALLER BASED ON THE INSTRUCTIONS SHOWN IN THE PARAGRAPH ON WATER CONNECTIONS
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
11
ACCURATE - i-AF Water-cooled direct expansion unit with indirect free cooling
Model
20
29
Frame
F3
No. of circuits / no. of compressors
1/1
1/1
Refrigerant
R410A
R410A
Rated air flow-rate
mc/h
6500
8000
Power supply
V/Ph/Hz
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
kW
19,37
28,58
Gross sensible capacity (1)
kW
19,37
28,35
SHR (1)
1,00
0,99
Compressor power consumption
kW
4,01
6,15
Power cons. with std. EC radial fans
kW
1,35
1,80
Power cons. with HP EC radial fans
kW
0,89
1,51
Water flow-rate (1)
l/h
4050
6020
Pressure drop Dp (1)
kPa
25
36
Minimum speed
Gross total capacity (1)
kW
7,75
12,42
Gross sensible capacity (1)
kW
7,75
12,42
SHR (1)
1,00
1,00
Compressor power consumption
kW
1,00
1,49
Power supply
V/Ph/Hz
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
kW
19,37
28,58
Gross sensible capacity (1)
kW
19,37
28,35
SHR (1)
1,00
0,99
Compressor power consumption
kW
4,01
6,15
Power cons. with std. EC radial fans
kW
1,35
1,80
Power cons. with HP EC radial fans
kW
0,89
1,51
Minimum speed
Gross total capacity (1)
kW
7,75
12,42
Gross sensible capacity (1)
kW
7,75
12,42
SHR (1)
1,00
1,00
Compressor power consumption
kW
1,00
1,49
CAPACITY DELIVERED IN FREE COOLING MODE
Gross total capacity (2)
kW
20,02
25,1
Gross sensible capacity (2)
kW
19,58
25,1
SHR
0,98
1,00
Pressure drop in FC operation
kPa
20
66
Total water content
l
36
11,8
FANS
No. of std. EC radial fans
1
1
No. of HP EC radial fans
1
1
Sound pressure level (5)
dB(A)
56
60
PLATE CONDENSER
Type
Number
1
1
Water content
2,5
3
CONNECTIONS
IN
1"1/2 F
1"1/2 F
Water connections *
OUT
1"1/4 M
1"1/4 M
HUMIDIFIER
Capacity
kg/h
5
5
ELECTRIC HEATERS
Steps
3
3
Heating capacity
kW
9
9
DIMENSIONS
Length
mm
1000
Depth
mm
790
Height
mm
1980
OUTDOOR UNIT COMBINATIONS
i-BDC remote condenser
030m
039m
BDC remote condenser
030m
039m
50
70
F4
F5
1/1
2/2
R410A
R410A
13500
19000
400/3N/50
90
F6
2/2
R410A
25000
130
F7
2/3
R410A
28000
55,10
51,00
0,93
12,20
3,20
3,13
11600
83
72,90
69,20
0,95
13,80
4,50
5,11
15000
62
94,50
87,10
0,92
19,10
6,10
6,72
19600
99
130,2
111,1
0,85
27,40
6,90
27300
75
24,60
22,70
24,60
22,70
1,00
1,00
3,30
3,40
460/3/60 - 380/3/60
24,40
22,50
0,92
3,40
26,10
25,60
0,98
3,30
55,10
51,00
0,93
12,20
3,20
3,13
74,01
69,69
0,94
14,37
4,50
5,11
93,5
86,24
0,92
18,34
6,10
6,72
133,38
113,09
0,85
28,51
6,90
24,63
24,30
0,99
3,29
22,70
22,70
1,00
3,38
24,51
22,52
0,92
3,31
26,10
25,60
0,98
3,30
43,8
43,8
1,00
123
19,1
58,1
58,1
1,00
122
26,8
78,26
78,26
1,00
137
32,5
104,88
94,21
0,90
132
47,8
2
2
64
3
3
67
3
4
67
3
69
1
8,5
1
12
AISI316 plate heat exchanger
1
2
5
2x3,8
1"1/2 F
1"1/4 M
2" F
1"1/4 M
2" F
2" M
2" F
2"1/2 M
5
8
8
8
3
15
3
18
3
18
3
24
1550
790
1980
2100
790
1980
2650
790
1980
2650
890
2180
062m
062m
092m
092m
123m
123m
190m
190m
1 - Inside air 24°C-50%, water 30-35°C - ESP 20 Pa
2 - inlet water 10°C and same flow-rate as calculated for DX operation - ESP 20 Pa
5 - measured at a height of 1.5 m and 2 m from the front of the unit in free field
*WARNING,THE DIAMETERS OF THE CONNECTION LINES BETWEEN THE INDOOR UNIT AND DRY COOLER MUST BE SIZED
BY THE INSTALLER BASED ON THE INSTRUCTIONS SHOWN IN THE PARAGRAPH ON WATER CONNECTIONS
12
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
ACCURATE - i-AD Air-cooled direct expansion unit
Model
Frame
No. of circuits / no. of compressors
Refrigerant
Rated air flow-rate
Power supply
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
Gross sensible capacity (1)
SHR (1)
Compressor power consumption
Power cons. with std. EC radial fans
Power cons. with HP EC radial fans
Minimum speed
Gross total capacity (1)
Gross sensible capacity (1)
SHR (1)
Compressor power consumption
Power supply
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
Gross sensible capacity (1)
SHR (1)
Compressor power consumption
Power cons. with std. EC radial fans
Power cons. with HP EC radial fans
Minimum speed
Gross total capacity (1)
Gross sensible capacity (1)
SHR (1)
Compressor power consumption
CAPACITY DELIVERED (CW)
Gross total capacity (4)
Gross sensible capacity (4)
SHR
Water flow-rate (4)
Total unit pressure drop (4)
Water content
FANS
No. of std. EC radial fans
No. of HP EC radial fans
Sound pressure level (5)
CONNECTIONS
Refrigerant connections (ODS Ø)
Water connections *
ELECTRIC HEATERS
Steps
Heating capacity
DIMENSIONS
Length
Depth
Height
OUTDOOR UNIT COMBINATIONS
i-BRE remote condenser
BRE remote condenser
20
29
F3
50
70
F4
F5
1/1
2/2
R410A
R410A
13500
19000
400/3N/50
90
F6
2/2
R410A
25000
130
F7
2/3
R410A
28000
1/1
R410A
6500
1/1
R410A
8000
18,89
18,89
1,00
4,26
1,35
0,89
27,50
27,50
1,00
6,83
1,80
1,51
53,24
50,21
0,94
13,42
3,20
3,13
69,10
67,40
0,98
16,10
4,50
5,11
91,4
83,0
0,91
20,90
6,10
6,72
124,4
108,7
0,87
30,80
6,90
7,2
7,2
1,00
1,28
11,31
11,31
1,00
2,05
22,7
20,90
22,7
18,80
1,00
0,90
4,47
4,52
460/3/60 - 380/3/60
22,50
21,70
0,96
4,43
23,90
23,90
1,00
4,58
18,89
18,89
1,00
4,26
1,35
0,89
27,50
27,50
1,00
6,83
1,80
1,51
53,24
50,21
0,94
13,42
3,20
3,13
70,34
68,15
0,97
16,64
4,50
5,11
89,54
85,03
0,95
20,46
6,10
6,72
127,07
110,13
0,87
31,81
6,90
7,2
7,2
1,00
1,28
11,31
11,31
1,00
2,05
22,7
22,7
1,00
4,47
20,90
18,80
0,90
4,52
22,50
21,70
0,96
4,43
23,90
23,90
1,00
4,58
l/h
kPa
l
24,3
20,1
0,82
4190
30
9
29,5
27,6
0,94
5560
35
9
51,4
47,5
0,92
8820
46
14
67,6
64,5
0,95
11600
26
19
91,0
85,0
0,93
15610
53
24
125,7
98,5
0,78
21620
68
30
dB(A)
1
1
56
1
1
60
2
2
64
3
3
67
3
4
67
3
69
IN - LIQ
OUT-GAS
IN
OUT
16
22
1"1/2 F
1" F
16
22
1"1/2 F
1" F
16
22
1"1/2 F
1" F
16
22
2" F
1"1/2 F
18
22
2" F
1"1/2 F
22
35
2" F
1"1/2 F
kW
3
9
3
9
3
15
3
18
3
18
3
24
1550
790
1980
2100
790
1980
2650
790
1980
2650
890
2180
065m
065m
100b
100b
116b
116b
190b
190b
mc/h
V/Ph/Hz
kW
kW
kW
kW
kW
kW
kW
kW
V/Ph/Hz
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
mm
mm
mm
1000
790
1980
027m
027m
044m
044m
1 - Inside air 24°C-50%, Cond. temperature 45°C - ESP 20 Pa
4 - air 24°C-50%, water 7-12 °C - ESP 20 Pa
5 - measured at a height of 1.5 m and 2 m from the front of the unit in free field
*WARNING,THE DIAMETERS OF THE CONNECTION LINES BETWEEN THE INDOOR UNIT AND DRY COOLER MUST BE SIZED
BY THE INSTALLER BASED ON THE INSTRUCTIONS SHOWN IN THE PARAGRAPH ON WATER CONNECTIONS
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
13
ACCURATE - i-AT Water-cooled direct expansion unit
Model
Frame
No. of circuits / no. of compressors
Refrigerant
Rated air flow-rate
mc/h
Power supply
V/Ph/Hz
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
kW
Gross sensible capacity (1)
kW
SHR (1)
Compressor power consumption
kW
Power cons. with std. EC radial fans
kW
Power cons. with HP EC radial fans
kW
Water flow-rate (1)
l/h
Pressure drop Dp (1)
kPa
Minimum speed
Gross total capacity (1)
kW
Gross sensible capacity (1)
kW
SHR (1)
Compressor power consumption
kW
Power supply
V/Ph/Hz
CAPACITY DELIVERED
Maximum speed
Gross total capacity (1)
kW
Gross sensible capacity (1)
kW
SHR (1)
Compressor power consumption
kW
Power cons. with std. EC radial fans
kW
Power cons. with HP EC radial fans
kW
Water flow-rate (1)
l/h
Pressure drop Dp (1)
kPa
Minimum speed
Gross total capacity (1)
kW
Gross sensible capacity (1)
kW
SHR (1)
Compressor power consumption
kW
CAPACITY DELIVERED (CW)
Gross total capacity (4)
kW
Gross sensible capacity (4)
kW
SHR
Water flow-rate (4)
l/h
Total unit pressure drop (4)
kPa
Water content
l
FANS
No. of std. EC radial fans
No. of HP EC radial fans
Sound pressure level (5)
dB(A)
CONNECTIONS
IN
Condenser water connections *
OUT
IN
Water connections *
OUT
HUMIDIFIER
Capacity
kg/h
ELECTRIC HEATERS
Steps
Heating capacity
kW
DIMENSIONS
Length
mm
Depth
mm
Height
mm
OUTDOOR UNIT COMBINATIONS
i-BDC remote condenser
20
29
F3
50
70
F4
F5
1/1
2/2
R410A
R410A
13500
19000
400/3N/50
90
F6
2/2
R410A
25000
130
F7
2/3
R410A
28000
1/1
R410A
6500
1/1
R410A
8000
19,37
19,37
1,00
4,01
1,35
0,89
4050
13
28,58
28,35
0,99
6,15
1,80
1,51
6020
22
55,10
51,00
0,93
12,20
3,20
3,13
11600
30
72,90
69,20
0,95
13,80
4,50
5,11
15000
26
94,50
87,10
0,92
19,10
6,10
6,72
19700
35
130,2
111,1
0,85
27,40
6,90
27300
29
7,75
7,75
1,00
1,00
12,42
12,42
1,00
1,49
24,60
22,70
24,60
22,70
1,00
1,00
3,30
3,40
460/3/60 - 380/3/60
24,40
22,50
0,92
3,40
26,10
25,60
0,98
3,30
19,37
19,37
1,00
4,01
1,35
0,89
4050
13
28,58
28,35
0,99
6,15
1,80
1,51
6020
22
55,10
51,00
0,93
12,20
3,20
3,13
11600
30
74,01
69,69
0,94
14,37
4,50
5,11
15000
26
93,5
86,24
0,92
18,34
6,10
6,72
19700
35
133,38
113,09
0,85
28,51
6,90
27300
29
7,75
7,75
1,00
1,00
12,42
12,42
1,00
1,49
24,60
24,60
1,00
3,30
22,70
22,70
1,00
3,40
24,40
22,50
0,92
3,40
26,10
25,60
0,98
3,30
24,3
20,1
0,82
4190
30
9
29,5
27,6
0,94
5560
35
9
51,4
47,5
0,92
8820
46
14
67,6
64,5
0,95
11600
26
19
91,0
85,0
0,93
15610
53
24
125,7
98,5
0,78
21620
68
30
1
1
56
1
1
60
2
2
64
3
3
67
3
4
67
3
69
1" 1/4 M
1" 1/4 M
1"1/2 F
1" F
1" 1/4 M
1" 1/4 M
1"1/2 F
1" F
1" 1/4 M
1" 1/4 M
1"1/2 F
1" F
1" 1/4 M
1" 1/4 M
2" F
1"1/2 F
2"M
2"M
2" F
1"1/2 F
2" 1/2M
2" 1/2M
2" F
1"1/2 F
5
5
5
8
8
8
3
9
3
9
3
15
3
18
3
18
3
24
1550
790
1980
2100
790
1980
2650
790
1980
2650
890
2180
062m
092m
123m
190m
1000
790
1980
030m
039m
1 - air 24°C-50%, water 30-35°C - ESP 20Pa
4 - air 24°C-50%, water 7-12°C - ESP 20Pa
5 - measured at a height of 1.5 m and 2 m from the front of the unit in free field
* PAY ATTENTIONS: PIPELINE DIMENSIONS MUST BE CALCULATED FROM INSTALLED LOCALLY,
FOLLOWING THE INSTRUCTION ON WATER CONNECTIONS PARAGRAPHS
14
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
HOT WATER RE-HEATING
Post reheating system by mean hot water, composed by finned coil with copper tubes, 3 way valve and actuator driven with the logic implemented in EVOLUTION+ controller
PERFORMANCE
Frame
Modello
Heating Capacity (4)
Water Flow (4)
Total pressure drops (4)
Heating Capacity (6)
Water Flow (6)
Total pressure drops (6)
Water connections
F2
kW
l/h
kPa
kW
l/h
kPa
inch
12
16,4
1410
19
8,1
1386
19
1/2
F3
18
20,2
1780
30
9,9
1730
29
1/2
4 - water IN / OUT 70°C/60°C, air 20°C
20
14,4
1240
15
7
1210
15
1/2
F4
50
28,7
2520
46
14,1
2460
47
3/4
29
16,1
1410
19
7,9
1370
19
1/2
F5
70
39,3
3450
40
19,3
3350
39
3/4
F6
90
41,6
3570
27
20,5
3560
28
1
F7
130
41,1
3610
27,00
20,3
3530
27
1
150
41,1
3610
27,00
20,3
3530
27
1
6 - water IN / OUT 45°C/40°C, air 20°C
HOT GAS REHEATING COILS
PERFORMANCE
Frame
Models
Type
Heating Capacity (1)
kW
F2
12
18
ON/OFF
10,1
F3
20
29
ON/OFF
8,4
9,3
F4
F5
F6
50
70
90
ON/OFF ON/OFF ON/OFF
16,2
22,6
26,3
F7
130
150
ON/OFF
30,5
(1) Operating conditions: Air 24°C/50% RH - Condensing temperature 45 °C
ACCESSING THE MAIN COMPONENTS
The air-conditioner is accessible from all sides by removing the
various panels.The front and/or side panels are opened in 2 different ways:
FRONT PANELS
All the front panels are hinged and fitted with locking latches and
seal. All the front panels are opened and closed using a tool (typically a screwdriver) to open and close the latches.
Once the latches have been opened, the front panels can be
swung open and then removed vertically to simplify the service
operations on the air-conditioner, especially where there is little
space available. Opening the front panels provides access to all
the components in the air-conditioner involved in routine maintenance. The number of front panels depends on the capacity of the
air-conditioner.
SIDE PANELS
All the side panels are accessible and removable.
Nonetheless, these do not need to be removed for routine maintenance operations. This means that, if necessary, a series of units
can be installed next to each other.
The side panels are fastened by screws.
These are accessible directly on the side panel by removing the
black plastic caps.
electrical panel
BACK PANELS
Fastened by normal self-tapping screws, these are not accessible
as when installed the back of the unit is against the wall
D
INSIDE PANELS
The compartment that contains the fans and the heaters is protected and insulated by a metal plate.
This is for safety reasons, so as to not have to shut the unit down
during normal maintenance operations.
WARNING: before restarting the air-conditioner, always
check that all the panels have been correctly replaced.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
15
TRANSPORT AND HANDLING
Move the air-conditioner, which must not be reclined or tipped
over, nor exposed to the elements, as near as possible to the site
of installation before removing the packaging and the pallet.
- using fabric slings underneath the unit, making sure that when
the slings are in tension these do not apply pressure on the top
edges.
The units can be lifted:
- using a forklift, sliding the forks through the openings in the pallet;
The air-conditioner must be stored indoors, preferably in its own
packaging, and protected against excessive humidity (<85% RH)
and temperature (> -20°C , < 50°C).
STANDARD PACKAGING
PACKAGING WITH WOODEN CRATE (OPTIONAL)
L
H
H
P
P
Mod.
L mm
P mm
H mm
12
18
20
1060
29
560
50
70
1610 2160
850
2250
90
130 150
2710
950
2265
Mod.
L mm
P mm
H mm
12
18
20
1090
L
29
590
2265
50
70
1640 2190
880
2320
90
130 150
2740
980
2380
The symbols shown on the packaging are compliant with the ISO 7000 standard; the meaning of the symbols is shown in the table.
FRAGILE: handle with care.
THIS SIDE UP: indicates the correct position
of the packaged unit.
KEEP DRY: indicates that the packaged unit
must be kept in a dry place.
TEMPERATURE LIMITS: indicates the
temperature limits for storing and handling the
packaged unit.
CENTRE OF GRAVITY: indicates the
centre of gravity of the packaged unit.
USE NO HOOKS: indicates that hooks cannot
be used to handle or lift the packaged unit.
KEEP AWAY FROM HEAT: indicates
that the packaged unit must be kept
away from sources of heat.
DO NOT STACK the packages.
RECEIVING THE UNIT
Check, upon delivery, that the air-conditioner is intact and in perfect condition; immediately notify the carrier in writing of any
damage that may be due to transport.
In particular, check that the panel where the user terminal is fitted
has not been damaged.
If the side panels have been damaged during transport, they must
be replaced before installing the unit.
Net Weights
Frame
Mod.
i-AX
i-AW
i-AD
i-AT
i-AF
16
F2
(kg)
(kg)
(kg)
(kg)
(kg)
EN
12
256
266
/
/
/
F3
18
268
280
/
/
/
20
316
328
295
330
330
29
385
399
360
399
399
F4
50
529
554
494
533
533
F5
70
757
791
730
766
766
F6
90
918
979
877
914
914
F7
130
1030
1120
1060
1150
1150
150
1050
1140
/
/
/
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
DIMENSIONS AND WEIGHT
OVER Models Frame 2
OVER Models Frame 4
Ventilatori radiali EC
EC Radial fan
OVER Models Frame 3
EC Radial fan
The drawings represent the configuration with air intake from the
front.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
17
OVER Models Frame 5
OVER Models Frame 6
EC Radial fan
EC Radial fan
OVER Models Frame 7
EC Radial fan
The drawings represent the configuration with air intake from the front.
18
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
UNDER Models Frame 2
UNDER Models Frame 3
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
UNDER Models Frame 4
EN
19
UNDER Models Frame 5
UNDER Models Frame 6
UNDER Models Frame 7
20
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
POSITIONING THE AIR-CONDITIONER
The air-conditioner can rest directly on the floor, perfectly level,
with a maximum difference in height of 5 mm between the ends
of the base: incorrect levelling may cause the condensate to leak
from the collection pan.
P1
L1
WARNING: the air-conditioner must be installed indoors
and in non-aggressive environments. Apply an elastic gasket
around the perimeter of the base to prevent the transmission of noise and vibrations.
SUPPORT FRAME (optional accessory)
A support frame is recommended:
- to allow the air-conditioner to be installed before assembling
the raised floor;
- to totally dampen any mechanical vibrations;
- to assist the laying of pipes and cables.
X
X = 200 ÷ 600 mm
The support frame is available as an accessory and is adjustable in
height, indicated in the figure by the distance X, between 200 and
600 mm. To prevent the transmission of noise and vibrations, an
elastic gasket, at least 5 mm thick, should be inserted between the
panels of the raised floor and the frame, which must also be insulated from the metallic structure of the floor.
i-ACCURATE
unit
NOTE: the frame must be fitted by the installer following the
instructions shown inside the packaging.
Raised floor
LOUVER KIT (optional accessory)
The louver is recommended to be used on UNDER units to deviate the air flow and allow better distribution.
Elastic gasket
Models
L1 (mm)
P1 (mm)
12
1000
485
18
1000
485
20
980
770
29
980
770
50
1530
770
70
2080
770
Elastic gasket
90
2630
770
130
2630
870
150
2630
870
OPERATING SPACE
Access is from the front only for all models.
This feature ensures easy access to all the main components in
the unit for installation and periodical maintenance.
Thanks to this feature, the units can be installed next to one
another, or alternatively fitted in racks.
To ensure easy maintenance, a space of at least 600 mm must be
left in front of the air-conditioner, as shown in the figure.
E
Make sure that the air intake and outlet are never
blocked, even partially.
D
L
Models
D (mm)
E (mm)
L (mm)
12
18
20
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
29
50
>600
70
90
130
150
0
0
EN
21
OPERATING LIMITS
All versions. The i-AX - i-AW - i-AF - i-AD - i-AT units are
designed for operation within the following operating ranges (the
limits are considered for new units that have been correctly
installed and maintained):
t
OUTSIDE AIR TEMPERATURE
46°C
Environmental conditions
from 20,0°C, 45% RH at 32°C, 55% RH
Outside conditions
from +10.0°C to +46.0°C in STANDARD version without condensing control
from -20.0°C to +46.0°C in MODULATING version with condensing control
from -45.0°C to +46.0°C in the LT version (low temperature).
35°C
WORKING AREA
BASIC version
10°C
modulating version
-20°C
LT version (low temperature)
-45°C
18°C/45%
INSIDE TEMPERATURE
28°C
30°C/55% t
For the correct operation of the air-conditioner, the conditions
shown in the following graph must be observed:
OPTIONAL BASE MOULDING (OVER UNITS)
The "OVER" units are designed for the connections to pass
through the base of the unit; nonetheless, if there is no raised
floor (units with intake from the rear or front), to simplify the
connection of the pipes and cables, a base moulding must
be used.
The base moulding, available as an accessory, is epoxy-polyester
powder painted, in the same colour as the external panels on the
air-conditioner, measures 200 mm in height and is fitted with an
inspection panel.
On the right- and left-hand sides of the base moulding are six
pre-cut sections for passing the cables and pipes;
The moulding must be fastened to the air-conditioner using the
M6 threaded inserts already arranged on the base.
A1
200
C1
air-conditioner
base
For the OVER units with intake from the bottom, base mouldings
are available with a height of 450 mm.
In this case too, the air-conditioner must be screwed to the base
moulding during the positioning phase.
unit
moulding
A1
450
C1
Models
A1 (mm)
C1 (mm)
22
EN
12
1000
485
18
1000
485
20
980
770
29
980
770
50
1530
770
70
2080
770
90
2630
770
130
2630
870
150
2630
870
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
AIR DISTRIBUTION, UNDER UNITS (UNDER UNITS)
In the units with air outlet from the bottom, the following details
must be ensured to allow for sufficient air flow-rate:
a) connection opening between the unit and the raised
floor; make a hole in the raised floor and position the air-conditioner over the centre of the hole: the air outlet opening
must not be blocked, even partially, by parts of panels, beams,
pipes or other objects; insert an elastic gasket around the
perimeter of the base to prevent the transmission of noise and
vibrations;
b) free air flow along the cavity of the raised floor; the
duct represented by the underfloor space must be sufficiently
high (at least 200-250 mm of free space, net of the panels and
the beams of the raised floor) and free of obstructions, especially near the air-conditioner;
c) grills and air distribution openings in the room; the air
exits the underfloor space through openings or grills, the position and surface area of which must be proportional to the
layout of the thermal load of the environment.
For units with air outlet from the bottom, the recommended air
outlet speed from the raised floor is between 1 and 2.5 m/s; consequently, the cross-section of the grills should be sized based on
this value
The total outflow area (sum of the areas of the openings and net
space of the grills) required for each model must be calculated by
dividing the total air flow-rate (in m3/s) by the required outlet
speed (in m/s).
WARNING: the air outlet must be completely free, as an
insufficient air outflow air will reduce the flow-rate, the performance of the air-conditioner and may affect reliability.
INTAKE PLENUM, UNDER VERSIONS (UNDER UNITS)
For ducting the air intake, plenums are available to be fitted
between the top of the unit and the air return duct or the falseceiling.
L
H
P
Models
L (mm)
P (mm)
H (mm)
12
18
20
29
1000
500
350
50
1550
790
500
70
2100
90
130
2650
150
890
500
INTAKE PLENUM, UNDER VERSIONS (OVER UNITS)
For ducting the air intake, plenums are available to be fitted
between the top of the unit and the air return duct or the falseceiling.
L
H
P
Models
L (mm)
P (mm)
H (mm)
12
18
20
1000
500
350
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
29
50
1550
790
500
70
2100
90
130
2650
150
890
500
EN
23
MOTOR-DRIVEN DAMPER OVER/UNDER (UNIT OVER/UNDER)
La serranda motorizzata, disponibile come accessorio opzionale, è
posta all'interno di un plenum alto 150 m.
The OVER and UNDER units, models 12-90, are delivered with
the damper already fitted, at the top of the unit, as shown in the
figure.
The OVER and UNDER units, models 130-150, are delivered with
the damper supplied in separate packaging.
Models
H mm
12-18
150
H
20÷150
150
FRONT OUTLET PLENUM (OVER UNITS)
The figure shows the front outlet plenum (optional for OVER
units).
L
H
P
12
L (mm)
P (mm)
H (mm)
18
20
29
1000
50
1550
500
350
70
2100
90
130
2650
790
150
890
500
FRONT OUTLET MOULDING (UNDER UNITS)
The figure shows the moulding for the front air outlet (optional for
Under units).
L1
H
P1
Models
L (mm)
P (mm)
H (mm)
24
EN
12
18
20
1000
500
350
29
50
1550
790
70
2100
90
130
2650
150
890
450
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
SOUNDPROOF SUCTION OR OUTLET PLENUM
The figure shows the soundproof plenum to be installed on the
top of the unit.
L
H
P
Models
L mm
P mm
H mm
12
18
20
29
1000
500
350
50
1550
790
70
2100
90
130
2650
150
890
500
DIRECT FREE COOLING PLENUM (UNDER UNITS)
This accessory is installed on the top of the unit, and is used to
take in cool outside air and then deliver it directly into the airconditioned environment. The plenum is supplied with 2
motorised dampers (one for the outside air + 1 for the inside
air), managed by the unit’s microprocessor controlled, which
modulate the quantity of air taken in from the outside to ensure
the room temperature set point is maintained.
This accessory is not available on AF units.
WARNING:
For correct installation, an elastic gasket should be fitted between
the plenum and the unit.
A PRESSURE-RELIEF DAMPER (supplied with the “FC CONNECTION KIT”) MUST BE USED, SO THAT THE AIR CAN DE DISCHARGED DURING TOTAL FREE COOLING OPERATION.
P
L
H
A
SECTION A-A
A
FRONT VIEW
TOP VIEW
Models
L mm
P mm
H mm
12
18
20
1000
500
600
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
29
50
1550
790
70
2100
90
130
2650
150
890
840
EN
25
DIRECT FREE COOLING BASE (OVER UNITS)
This accessory is installed on the BOTTOM of the unit, and is
used to take in cool outside air and then deliver it directly into
the air-conditioned environment. The plenum is supplied with 2
motorised dampers (one for the outside air + 1 for the inside
air), managed by the unit’s microprocessor controlled, which
modulate the quantity of air taken in from the outside to ensure
the room temperature set point is maintained.
This accessory is not available on AF units.
INSTALLATION EXAMPLE
WARNING:
For correct installation, an elastic gasket should be fitted between
the plenum and the unit.
A PRESSURE-RELIEF DAMPER (supplied with the “FC CONNECTION KIT”) MUST BE USED, SO THAT THE AIR CAN DE DISCHARGED DURING TOTAL FREE COOLING OPERATION.
UNDER
OVER
with free cooling plenum
with free cooling base
P
L
H
A
A
SECTION A-A
FRONT VIEW
TOP VIEW
Models
L mm
P mm
H mm
12
18
20
29
50
1550
790
1000
500
500
70
2100
90
130
2650
150
890
700
DIRECT FREE COOLING CONNECTION KIT (UNDER/OVER UNITS)
C
D
E
F
A
D
B
26
EN
A.
B.
C.
D.
E.
F.
D
Outside rain grill
Pressure-relief damper
Flange
Clamp
Hose
Free cooling plenum
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
OPTIONAL AIR FILTER
The standard filter (G2/G4) and optional (F5/F6/F7/F8) are installed inside the conditioning unit before the finned coil.
Additional pressure drop:
Std G2 filter
Std G4 filter
Frame 5
Pa
Pa
Frame 2
250
F8
250
F8
200
200
F7
150
F7
150
F6
100
F6
100
F5
50
50
F5
G4
0
3500
4000
4500
5500
6500 m³/h
6000
11000
13000
Frame 6
Std G2 filter
Pa
Pa
Frame 3
5000
0
9000
250
F8
200
17000
19000
21000 m³/h
Std G4 filter
350
F8
300
250
F7
150
15000
F7
200
F6
100
F6
150
100
50
50
F5
0
3500
4500
5500
7500
8500
Std G4 filter
F5
15500
250
200
F8
150
F7
17500
19500
21500
23500
25500
m³/h
Std G4 filter
Frame 7
Pa
Frame 4
Pa
6500
0
13500
9500 m³/h
300
250
F8
200
F7
150
F6
F6
100
100
50
50
F5
0
7500
8500
9500
10500
11500
12500
13500
F5
14500 m³/h
0
19000
21000
23000
25000
27000
29000
31000 m³/h
OPTIONAL FRESH AIR
The fresh air kit is supllied with G3 filter installed in suction side of fan, allowing to mix the fresh air with recirculating air. Connect a flexible
pipe diameter 100mm (not supplied) as shown in the image below. The fresh air volume is around 5% of nominal air flow of unit.
OVER
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
UNDER
EN
27
POSITION AND DIAMETER OF THE WATER CONNECTIONS
OVER CONNECTIONS (i-AX - i-AW)
size 12-18
IR
OR
IW
OW
IP
IH
OH
IHW
OHW
IN refrigerant i-AX
OUT refrigerant i-AX
IN water cooled i-AW
OUT water cooled i-AW
IN power supply
IN humidifier water
OUT humidifier water and condensate water drain
IN hot water
OUT hot water
PLAN VIEW
FRONT OF UNIT
UNDER CONNECTIONS (i-AX - i-AW)
size 12-18
IR
OR
IW
OW
IP
IH
OH
IHW
OHW
IN refrigerant i-AX
OUT refrigerant i-AX
IN water cooled i-AW
OUT water cooled i-AW
IN power supply
IN humidifier water
OUT humidifier water
IN hot water
OUT hot water
PLAN VIEW
FRONT OF UNIT
OVER CONNECTIONS
(i-AX - i-AW - i-AD - i-AT - i-AF)
size 20-29
IR
OR
IW
OW
IWF
IP
IH
OH
IHW
OHW
OC
IN refrigerant i-AX - i-AD
OUT refrigerant i-AX - i-AD
IN water cooled i-AW
OUT water cooled i-AW - i-AT - i-AF
IN water i-AF - i-AT
IN power supply
IN humidifier water
OUT humidifier water
IN hot water
OUT hot water
OUT condensate water drain
PLAN VIEW
28
EN
FRONT OF UNIT
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
UNDER CONNECTIONS
(i-AX - i-AW - i-AD - i-AT - i-AF)
size 20-29
IR
OR
IW
OW
IWF
IP
IH
OH
IHW
OHW
IN refrigerant i-AX - i-AD
OUT refrigerant i-AX - i-AD
IN water cooled i-AW
OUT water cooled i-AW - i-AT -i-AF
IN water i-AF - i-AT
IN power supply
IN humidifier water
OUT humidifier water
IN hot water
OUT hot water
PLAN VIEW
FRONT OF UNIT
OVER CONNECTIONS
(i-AX - i-AW - i-AD - i-AT - i-AF)
size 50
IR1
OR1
IW1
OW1
IWF
IP
IH
OH
IHW
OHW
OC
IN refrigerant circ. 1 i-AX - i-AD
OUT refrigerant circ. i-AX - i-AD
IN water cooled circ. 1 i-AW
OUT water cooled circ. 1 i-AW - i-AF - i-AT
IN water i-AF - i-AT
IN power supply
IN humidifier water
OUT humidifier water
IN hot water
OUT hot water
OUT condensate water drain
PLAN VIEW
FRONT OF UNIT
UNDER CONNECTIONS
(i-AX - i-AW - i-AD - i-AT - i-AF)
size 50
IR1
OR1
IW1
OW1
IWF
IP
IH
OH
IHW
OHW
IN refrigerant circ. 1 i-AX -AD
OUT refrigerant circ. 1 i-AX -AD
IN water cooled circ. 1 i-AW
OUT water cooled circ. 1 i-AW - i-AF - i-AT
IN water i-AF - i-AT
IN power supply
IN humidifier water
OUT humidifier water
IN hot water
OUT hot water
PLAN VIEW
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
FRONT OF UNIT
EN
29
OVER CONNECTIONS
(i-AX - i-AW - i-AD - i-AT - i-AF)
size 70
IR1
OR1
IR2
OR2
IW1
OW1
IW2
OW2
IWF
IP
IH
OH
IHW
OHW
OC
IN refrigerant circ. 1 i-AX - i-AD
OUT refrigerant circ. 1 i-AX - i-AD
IN refrigerant circ. 2 i-AX - i-AD
OUT refrigerant circ. 2 i-AX - i-AD
IN water cooled circ. 1 i-AW
OUT water cooled circ. 1 i-AW - i-AF - i-AT
IN water cooled circ. 2 i-AW
OUT water cooled circ. 2 i-AW - i-AF - i-AT
IN water i-AF - i-AT
IN power supply
IN humidifier water
OUT humidifier water
IN hot water
OUT hot water
OUT condensate water drain
PLAN VIEW
FRONT OF UNIT
UNDER CONNECTIONS
(i-AX - i-AW - i-AD - i-AT - i-AF)
size 70
IR1
OR1
IR2
OR2
IW1
OW1
IW2
OW2
IWF
IP
IH
OH
IHW
OHW
IN refrigerant circ. 1 i-AX - i-AD
OUT refrigerant circ. 1 i-AX - i-AD
IN refrigerant circ. 2 i-AX - i-AD
OUT refrigerant circ. 2 i-AX - i-AD
IN water cooled circ. 1 i-AW
OUT water cooled circ. 1 i-AW - i-AF - i-AT
IN water cooled circ. 2 i-AW
OUT water cooled circ. 2 i-AW - i-AF - i-AT
IN water i-AF - i-AT
IN power supply
IN humidifier water
OUT humidifier water
IN hot water
OUT hot water
PLAN VIEW
FRONT OF UNIT
OVER CONNECTIONS
(i-AX - i-AW - i-AD - i-AT - i-AF)
size 90
IR1
OR1
IR2
OR2
IW
OW
IWF
IP
IH
OH
IHW
OHW
IN refrigerant circ. 1 i-AX - i-AD
OUT refrigerant circ. 1 i-AX - i-AD
IN refrigerant circ. 2 i-AX - i-AD
OUT refrigerant circ. 2 i-AX - i-AD
IN water cooled i-AW
OUT water cooled i-AW - i-AT - i-AF
IN water i-AF - i-AT
IN power supply
IN humidifier water
OUT humidifier water
IN hot water
OUT hot water
PLAN VIEW
30
EN
FRONT OF UNIT
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
UNDER CONNECTIONS
(i-AX - i-AW - i-AD - i-AT - i-AF)
size 90
IR1
OR1
IR2
OR2
IW
OW
IWF
IP
IH
OH
IHW
OHW
OC
IN refrigerant circ. 1 i-AX - i-AD
OUT refrigerant circ. 1 i-AX - i-AD
IN refrigerant circ. 2 i-AX - i-AD
OUT refrigerant circ. 2 i-AX - i-AD
IN water cooled i-AW
OUT water cooled i-AW - i-AT - i-AF
IN water i-AF - i-AT
IN power supply
IN humidifier water
OUT humidifier water
IN hot water
OUT hot water
OUT condensate water drain
PLAN VIEW
FRONT OF UNIT
CONNESSIONI OVER
(i-AX - i-AW - i-AD - i-AT - i-AF) size 130
(i-AX - i-AW) size 150
IW
OW
IP
IH
OH
OC
IR1
OR1
IR2
OR2
IN water cooled i-AW
OUT water cooled
i-AW - i-AT - i-AF
IN power supply
IN humidifier water
OUT humidifier water
OUT condensate water drain
IN refrigerant circ. 1
i-AX - i-AD
OUT refrigerant circ.
1 i-AX - i-AD
IN refrigerant circ. 2
i-AX - i-AD
OUT refrigerant circ. 2
i-AX - i-AD
PLAN VIEW
FRONT OF UNIT
CONNESSIONI UNDER
(i-AX - i-AW - i-AD - i-AT - i-AF) size 130
(i-AX - i-AW) size 150
IW
OW
IP
IH
OH
OC
IR1
OR1
IR2
OR2
IN water cooled i-AW
OUT water cooled
i-AW - i-AT - i-AF
IN power supply
IN humidifier water
OUT humidifier water
OUT condensate water drain
IN refrigerant circ. 1
i-AX - i-AD
OUT refrigerant circ. 1
i-AX - i-AD
IN refrigerant circ. 2
i-AX - i-AD
OUT refrigerant circ. 2
i-AX - i-AD
PLAN VIEW
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
FRONT OF UNIT
EN
31
WATER CONNECTIONS
For all the water connections (with the exception of the
condensate drain), the following are recommended:
- flexible connections to avoid transmitting vibrations and
allow small movements of the air-conditioner;
- joints in three pieces, near the fittings, to simplify the
removal of the unit;
- on-off valves to disconnect the unit from the water circuit: where possible use ball valves with full opening to
minimise pressure drop.
For i-AW - i-AF - i-AT models check that the cross-section
of the chilled water pipes and the characteristics of the circulating pump are suitable: an insufficient water flow-rate
affects the performance of the air-conditioner.
Check that the water inlet and outlet connections are correct. Insulate all the chilled water pipes with closed cell
material (e.g.: Armaflex or equivalent), to prevent condensation; the insulation must allow access to the valves and
the three-piece joints.
For i-AW - i-AF - i-AT models check that the water circuit
has been filled with an antifreeze mixture containing the
right percentage of ethylene glycol.
To select the pipeline refer to "Pressure Drops on
stainless steel pipes"
CONNECTION TO BRAZED PLATE CONDENSER i-AW - i-AT - i-AF
i-AW - i-AT - i-AF water-cooled units
The condenser must be connected to the cooling water circuit,
making sure that the water inlet and outlet connections are correct.
If the water temperature falls below the dew point of the conditioned air, insulate the pipes with closed cell material (e.g.:
Armaflex or equivalent) to prevent condensation; the insulation
must allow access to the valves and the three-piece joints.
Seal the holes where the pipes pass through the base of the airconditioner to avoid the bypass of air.
N.B.: the water system of the unit is PN16
CORRECTION FACTORS
ETHYLENE GLYCOLE
A mix of water plus glycole used has fluid instead of only water cause a cooling capacity reduction of the unit. Multiplay the cooling capacity
for the values reported of the following tables
Iceing temperature
% of glycole on tot. charge
Flow factor
P. drops factor
cQ
cdp
0
0
1
1
-5
12%
1,02
1,07
-10
20%
1,04
1,11
-15
28%
1,075
1,18
-20
35%
1,11
1,22
-25
40%
1,14
1,24
INCROSTATION FACTOR
All datas reported are refered to a complete clean brazed blade condenser (incrostation factor = 1).
For different values of incrostation factor multiplay all datas reported on cooling capacity tables for factors reported on following table.
Incrostation factor
Incrostation factor
Compressor factor
Total power factor
32
EN
(m2 °C/W)
f1
fk1
fx1
4,4 x10-5
-------
0,86x10-4
0,96
0,99
0,99
1,72x10-4
0,93
0,98
0,98
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
1
2
3
4
5
6
7 8 9 10 12 14 16 18 20
30
40
50 60 70 80 90100
200
300
400 500
500.000
500.000
400.000
”
Ø5
s
m/
4,0
s
m/
3,5
s
m/
3,0
s
m/
2,5
s
m/
2,0
s
m/
1,8
s
m/
1,6
s
m/
1,4
300.000
s
m/
1,2
s
m/
1,0
400.000
s
m/
0,8
Water flow l/h
Pressure Drops on stainless steel pipes (inch.) - Water T .= 10°C
300.000
”
Ø4
200.000
s
m/
0,6
100.000
90.000
80.000
70.000
60.000
50.000
”
Ø3
Ø2
40.000
”
Ø5
20.000
Ø1
”
Ø4
10.000
9.000
8.000
7.000
6.000
5.000
Ø1
Ø2
1/2”
30.000
1/2”
20.000
1/4”
10.000
9.000
8.000
7.000
6.000
5.000
4.000
/4”
Ø3
3.000
2.000
100.000
90.000
80.000
70.000
60.000
50.000
40.000
”
Ø1
”
Ø3
4.000
1/2”
”
Ø2
”
Ø6
30.000
200.000
3.000
2.000
”
Ø2
/2”
Ø1
1.000
900
800
700
600
500
Ø1
Ø1
1/2”
1.000
900
800
700
600
500
/8”
Ø3
1/4”
400
400
”
Ø1
300
200
300
200
/4”
Ø3
s
m/
0,8
s
m/
0,6
s
m/
0,4
s
m/
0,2
100
100
1
2
3
4
5
6
7 8 9 10 12 14 16 18 20
30
40
50 60 70 80 90100
200
300
400 500
Linear Pressure Drops, (mm w.c./m)
EXAMPLE OF SELECTION:
• consider a water speed limit inside the pipeline of 1-1,2m/s
• cross the water flow value requested (in the example 5.000l/h)
• extract the pressure drop value of pipe diameter selected (in example 35mm w.c./m)
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
33
1
2
3
4
5
7 8 9 10 12 14 16 18 20
6
30
40
50 60 70 80 90100
200
300
400 500
500.000
500.000
”
Ø5
s
m/
4,0
s
m/
3,5
s
m/
3,0
s
m/
2,5
s
m/
2,0
s
m/
1,8
s
m/
1,6
s
m/
1,4
300.000
s
m/
1,2
s
m/
1,0
400.000
s
m/
0,8
Water Flow l/h
Pressure Drops on stainless steel pipes (inch.) - Water T .= 50°C
400.000
300.000
”
Ø4
200.000
”
Ø3
s
m/
0,6
100.000
90.000
80.000
70.000
60.000
50.000
Ø2
40.000
200.000
1/2”
40.000
”
Ø2
”
Ø6
100.000
90.000
80.000
70.000
60.000
50.000
30.000
30.000
”
Ø5
20.000
Ø1
”
Ø4
10.000
9.000
8.000
7.000
6.000
5.000
Ø1
Ø2
1/2”
10.000
9.000
8.000
7.000
6.000
5.000
/4”
Ø3
3.000
”
Ø2
2.000
20.000
1/4”
”
Ø1
”
Ø3
4.000
1/2”
4.000
3.000
2.000
/2”
Ø1
Ø1
1.000
900
800
700
600
500
Ø1
400
1/2”
/8”
Ø3
1/4”
400
”
Ø1
300
300
/4”
Ø3
200
1.000
900
800
700
600
500
200
s
m/
0,8
s
m/
0,6
s
m/
0,4
s
m/
0,2
100
100
1
2
3
4
5
6
7 8 9 10 12 14 16 18 20
30
40
50 60 70 80 90100
200
300
400 500
Linear Pressure Drops, (mm w.c./m)
34
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
1
2
3
4
5
6
7 8 9 10 12 14 16 18 20
30
40
50 60 70 80 90100
200
300
400 500
500.000
500.000
”
Ø5
s
m/
4,0
s
m/
3,5
s
m/
3,0
s
m/
2,5
s
m/
2,0
s
m/
1,8
s
m/
1,6
s
m/
1,4
300.000
s
m/
1,2
s
m/
1,0
400.000
s
m/
0,8
Water Flow l/h
Pressure Drops on stainless steel pipes (inch.) - Water T .= 80°C
400.000
300.000
”
Ø4
200.000
200.000
”
Ø3
s
m/
0,6
100.000
90.000
80.000
70.000
60.000
50.000
Ø
40.000
2”
2 1/
”
Ø2
”
Ø6
100.000
90.000
80.000
70.000
60.000
50.000
40.000
30.000
30.000
”
Ø5
20.000
Ø1
”
Ø4
10.000
9.000
8.000
7.000
6.000
5.000
Ø1
Ø2
10.000
9.000
8.000
7.000
6.000
5.000
1/2”
4.000
/4”
Ø3
3.000
3.000
”
Ø2
2.000
20.000
1/4”
”
Ø1
”
Ø3
4.000
1/2”
2.000
/2”
Ø1
Ø1
1.000
900
800
700
600
500
Ø
400
1/2”
1.000
900
800
700
600
500
/8”
Ø3
4”
1 1/
400
”
Ø1
300
300
/4”
Ø3
200
200
s
m/
0,8
s
m/
0,6
s
m/
0,4
s
m/
0,2
100
100
1
2
3
4
5
6
7 8 9 10 12 14 16 18 20
30
40
50 60 70 80 90100
200
300
400 500
Linear Pressure Drops (mm w.c./m)
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
35
heat insulation
AIR CONDENSER: SUGGESTED INSTALLATION
1/100
air-conditioner
discharge
heat insulation
max 50 metres
1/100
air-conditioner
max 5
metres
outlet
air-conditioner
heat insulation
1/100
liquid
max 3
metres
max 15
metres
max 3
metres
N.B.: Create traps as shown in the figure, making sure to fill them with oil when commissioning the system.
Fit a non-return valve at the unit outlet, on the gas outlet pipe.
The liquid piping must be protected against sunlight.
For two-circuit units (70-90-130-150), install an oil separator in the circuit with the ON/OFF compressor, for
lengths exceeding 50m, see the paragraph OIL SEPARATORS.
36
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
REFRIGERANT CONNECTIONS (i-AX / i-AD)
Warning: All work must be performed, components selected and materials used in complete accordance with the legislation in force
in material in the country concerned, and considering the operating conditions and intended uses of the system, by qualified personnel.
The diameter of connecting pipes between the conditioner and condensing unit must be respected, otherwise the guarantee becomes
invalid. Always use large radius curve (bending radius at least equal to pipe diameter)
RECOMMENDED OUTSIDE DIAMETERS OF THE LINES (for equivalent lengths up to 50 m)
Models
GAS
PIPELINE
Liquid line
Minimum thickness
R410A
Discharge line
Minimum thickness
12
18
20
29
50
70
90
130
150
2x16
1,00
2x22
1,00
2x22
1,00
2x35
1,50
2x22
1,00
2x35
1,50
DIAMETER PIPE mm
14
1,00
18
1,00
14
1,00
18
1,00
16
1,00
22
1,00
16
1,00
22
1,00
16
1,00
22
1,00
2x16
1,00
2x22
1,00
NOTE: The diameter of the refrigerant lines between the air-conditioner and the remote condenser (OD) must be chosen according to
the length of the lines, and therefore this will not always coincide with the inside diameter of the joint to be welded supplied by the manufacturer. Special care must be paid to the insulation of the hot gas pipes under the raised floor.
Equivalents lenght in meters of: curve, shut-off and non-return valve
Nominal diameter
(mm)
90°
45°
180°
90°
12
0,50
0,25
0,75
2,10
1,90
14
0,53
0,26
0,80
2,20
2,00
16
0,55
0,27
0,85
2,40
2,10
18
0,60
0,30
0,95
2,70
2,40
22
0,70
0,35
1,10
3,20
2,80
28
0,80
0,45
1,30
4,00
3,30
35
1,10
0,55
1,75
5,00
4,50
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
37
OIL SEPARATOR
On installations with air-cooled units (i-AX / i-AD) with remote condensers, if the refrigerant lines are more than 50 m long an oil separator must be installed only on the circuit with ON/OFF compressor, to prevent lubricating oil from circulating in the system together with
the refrigerant and possibly breaking the compressor.
Finally, the use of an oil separator leads to:
• a longer life of the compressor;
• a better performance of the whole system with consequent energy saving, due the high coefficient of condenser and evaporator performance by almost completely removing oil deposits from their exchange surfaces;
• a quieter operation by reducing pulsations.
The circuit with INVERTER-DRIVEN compressor is already fitted with an oil separator, while i-AX/i-AD units implement a LONG PIPE DISTANCE function that allows correct lubrication of the inverter-driven compressor even at low speeds (<50 Hz) using brief cycles at higher
frequency (70 Hz).
The oil separator have to be selected considering the following parameters:
• power cooling of refrigerant system
• refrigerant fluid type
• the inlet diameter of oil separator have to be equal to the dicharge gas diameter of compressor
POWER COOLING IN kW*
Model
OS 10
OS 30
OS 40
OS 70
R410A
11,5
33
42
73
* refered to evaporating temperature +5°C and condensing temperature 40°C
The oil separators have to be installed in the discharge line between the compressor and the condenser mounted securely in a vertical
position and reasonably close to the compressor.
Oil separator performs best when operating at or near the compressor discharge temperature. In location the oil separator, choose a position to avoid, as far as possible, chilling of the shell, which may result in condensing of liquid within the separator. If this is not possible, it is
advisable to supply the separator with the insulation or strap heater to prevent the refrigerant in the system from condensing in the shell.
Acting as the lay out of refrigerating system, the return line may be run from the oil fitting to the suction line upstream the ON-OFF compressor.
A sight glass may be installed in the oil line, in a position that oil is flowing through the tube, to check the correct working of the oil separator. Oil separators must be always pre-charged before its use, as described on the table, with the same oil of the compressor.
Frame
Models
OIL SEPATATOR
38
EN
Models
Precharge
F6
70
90
OS40
0,3 lt
F7
130
150
OS70
0,85 lt
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
VOLUME
INDOOR COIL VOLUME AND REFRIGERANT CHARGE
Indicative gas content
R410A (kg)
2,2
3
3,5
5
8,4
7x2
2 x 12,3
2 x 13,4
2 x 13,4
Models
i-AX 12
i-AX 18
i-AX - i-AD 20
i-AX - i-AD 29
i-AX - i-AD 50
i-AX - i-AD 70
i-AX - i-AD 90
i-AX - i-AD 130
i-AX - i-AD 150
Indicative gas content
R410A (kg)
2,5
3,4
4
5,7
9,6
16
28,1
30,5
30,5
Models
i-AW 12
i-AW 18
i-AW - i-AT - i-AF 20
i-AW - i-AT - i-AF 29
i-AW - i-AT - i-AF 50
i-AW - i-AT - i-AF 70
i-AW - i-AT - i-AF 90
i-AW - i-AT - i-AF 130
i-AW 150
CONDENSER COIL VOLUME AND REFRIGERANT CHARGE
BASIC-LT
Models
BRE/i-BRE 014m
BRE/i-BRE 022m
BRE/i-BRE 027m
BRE/i-BRE 044m
BRE/i-BRE 051m
BRE/i-BRE 065m
BRE/i-BRE 054b
BRE/i-BRE 065b
BRE/i-BRE 076b
BRE/i-BRE 100b
BRE/i-BRE 116b
BRE/i-BRE 134b
BRE/i-BRE 190b
Refrigerant
charge
R410A (kg)
1,1
1,7
3,3
3,3
4,9
4,8
2 x 3,3
2 x 2,4
2 x 3,65
2 x 11,5
2 x 10,75
2 x 10,75
2 x 14,5
LN models
BRE/i-BRE 14m-LN
BRE/i-BRE 022m-LN
BRE/i-BRE 027m-LN
BRE/i-BRE 044m-LN
BRE/i-BRE 051m-LN
BRE/i-BRE 065m-LN
BRE/i-BRE 054b-LN
BRE/i-BRE 065b-LN
BRE/i-BRE 076b-LN
BRE/i-BRE 100b-LN
BRE/i-BRE 116b-LN
BRE/i-BRE 134b-LN
Refrigerant
charge
R410A (kg)
1,7
3,2
3,3
4,9
7,3
7,2
2 x 4,8
2 x 8,65
2 x 11,5
2 x 11,5
2 x 11
2 x 11
Refrigerant
charge
R410A (kg)
3,2
3
3,8
6,4
5,7
9,6
2 x 4,8
2 x 7,2
2 x 4,8
2 x 10,8
2 x 9,6
2 x 14,4
Models
BREC - M1D
BREC - M2B
BREC - M2C
BREC - M2D
BREC - M3C
BREC - M3D
BREC - M3D_B
BREC - M2F_B
BREC - M3G_B
BREC - M3F_B
BREC - M4E_B
BREC - M4F_B
GAS CONTENT FOR LINEAR METER
Pipe diameter
Discharge line
R410A
Liquid line
gr/m
gr/m
10
59
12
17
90
16
29
160
18
39
209
22
64
327
29
105
-
N.B. Important: when gas is added,lubrication oil must also be added in a ratio of 10% weight of the refrigerant gas aded.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
39
CONDENSATE DRAIN
The condensate is removed from the pan located underneath the
coil through a hose with drain trap, already fitted in the unit; the
end of the hose should be connected to the sewerage system in
the building via a rubber or plastic hose with an inside diameter
of 20 mm.
If the air-conditioner is fitted with a humidifier, the condensate is
drained from the humidifier pan, excluding Over units (see the
following paragraph).
During installation, pour water into the condensate collection pan
so as to fill the drain trap inside the unit with water.
ELECTRICAL CONNECTIONS
Correct electrical connection, performed in a workmanlike manner and in compliance with the standards in force, is important
for the prevention of accidents and the good and long-lasting
operation of the air-conditioner.
Before starting the unit, check the tightness of all the
electrical connections and cables on the unit, as these
may have come loose during handling and transport.
ACCESS TO THE ELECTRICAL PANEL AND CABLE
INLETS
Before performing any work on the electrical parts, make sure
that there is no live voltage and that the disconnecting switch is
open (position “O”);
The power section of the electrical panel is protected by a plastic
screen; to remove the screen, open the main switch and remove
the fastening screws.
Part A: connection of the power cable
to the main disconnecting switch IG
N1
4
R1 S1 T1
5
ON
A
0
OFF
2
IG
3
N
1
1 Shielded RS485 or LAN cable outlet;
2 Mains power supply inlet;
3 Remote control and alarm signal
cable inlet.
4 Local user terminal
5 Electrical panel
CONNECTION TO THE MAINS - CROSS-SECTION OF
THE CABLES - PROTECTION DEVICES
- Check that the mains voltage corresponds to the rated values for the unit (voltage, no. of phases, frequency) shown on the
electrical panel.
The power supply voltage must be between ± 10% of the
rated value: operation at voltages outside of these limits may
void the warranty.
- Fasten the ends of the power cable to the terminals on the
main switch inside the electrical panel; fully tighten the screws.
Connect the yellow-green earth wire to the special terminal
marked 'PE'.
40
EN
L1 L2 L3
Power cable (provided
by the customer)
ACCESS TO THE BOARD
To access the board, open the front panel and the thermoformed
cover on the electrical panel.
The electronic components are sensitive to discharges of static
electricity from the human body.
Touch an earthed object before handling any electronic component.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
MINIMUM CROSS-SECTION OF THE POWER CABLES
The cross-section of the power cable must be chosen according
to the length of the cable and the type of installation, based on
the maximum current input of the air-conditioner and so as to
prevent excessive voltage drops (the power supply voltage must
be between ± 10% of the rated value).
The following table shows the minimum recommended cross-sections for the power cables.
- A backup fuse should be fitted upstream of the power
line for short-circuit current up to 10 kA.
ELECTRICAL SPECIFICATIONS
TOTAL UNIT POWER INPUT R410A
Frame
2
2
3
3
4
5
6
7
7
Vers.
B
Mod.
V/ph/Hz FLI (kW) FLA (A)
12
230/1/50
4,96
29,1
18
400/3N/50 11,06
19,4
20
400/3N/50 12,06
18,5
29
400/3N/50 18,66
28,7
50
400/3N/50 22,94
36,6
70
400/3N/50 30,26
53,9
90
400/3N/50 43,63
76,0
130 400/3N/50 52,18
93,0
150 400/3N/50 59,18
107,0
R
SA (A) FLI (kW) FLA (A)
12
10,36
52,6
20
19,06
54,2
19
21,06
31,5
20
27,66
41,7
50
37,94
58,3
162
36,36
55,9
182
46,23
76,0
190
52,38
93,0
213
59,18
107,0
H
SA (A) FLI (kW) FLA (A)
12
7,21
38,9
20
14,81
24,9
19
15,81
24,0
20
22,41
34,2
50
26,69
42,1
162
36,26
62,6
182
49,63
84,7
190
59,68
104,0
213
66,68
118,0
T
SA (A) FLI (kW) FLA (A)
21
10,36
52,6
26
19,06
54,2
25
21,06
31,5
26
27,66
41,7
56
37,94
58,3
162
36,36
62,6
182
49,63
84,7
190
59,68
104,0
213
66,68
118,0
SA (A)
21
26
25
26
56
162
182
190
213
Frame
2
2
3
3
4
5
6
7
7
Vers.
Mod.
12
18
20
29
50
70
90
130
150
V/ph/Hz
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
B
FLI (kW) FLA (A)
/
/
11,16
17,4
12,16
16,5
19,16
25,8
22,94
36,6
30,79
51,9
42,25
69,0
40,81
67,0
42,4
69,0
R
SA (A) FLI (kW) FLA (A)
/
/
/
20
19,3
27,6
19
21,2
27,8
20
28,2
37,1
50
37,9
55,5
162
36,4
52,5
166
46,2
69,0
166
52,4
75,2
166
52,4
75,2
H
SA (A) FLI (kW) FLA (A)
/
/
/
20
14,91
22,1
19
15,91
21,2
20
22,91
30,5
50
26,69
41,3
162
36,79
59,4
166
48,25
76,5
166
48,31
76,4
166
49,9
78,4
T
SA (A) FLI (kW) FLA (A)
/
/
/
25
19,26
27,6
24
21,16
27,8
25
28,16
37,1
55
37,94
55,5
162
36,79
59,4
166
48,25
76,5
166
52,38
76,4
166
52,38
78,4
SA (A)
/
25
24
25
55
162
166
166
166
Frame
2
2
3
3
4
5
6
7
7
Vers.
Mod.
12
18
20
29
50
70
90
130
150
V/ph/Hz
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
B
FLI (kW) FLA (A)
/
/
11,06
19,9
12,06
19,0
18,16
28,7
22,94
36,6
30,79
55,9
42,25
74,0
40,81
71,0
42,4
74,0
R
SA (A) FLI (kW) FLA (A)
/
/
/
20
19,16
32,2
19
21,06
32,7
20
27,16
42,4
50
37,94
59,4
180
36,36
57,3
184
46,23
74,0
184
52,38
81,5
184
52,38
81,5
H
SA (A) FLI (kW) FLA (A)
/
/
/
20
19,16
32,2
19
15,61
24,7
20
21,71
34,4
50
26,49
42,3
180
36,52
65,0
184
47,98
83,1
184
47,92
82,4
184
49,51
85,4
T
SA (A) FLI (kW) FLA (A)
/
/
/
26
19,16
32,2
25
21,06
32,7
26
27,16
42,4
56
37,94
59,4
180
36,52
65,0
184
47,98
83,1
184
52,38
82,4
184
52,38
85,4
SA (A)
/
26
25
26
56
180
184
184
184
EN
41
B = cooling only
R = cooling only + STD hearters
H = cooling only + humidifier
T = cooling only + STD heaters + humidifier
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
POWER CONSUMPTION OF INDIVIDUAL COMPONENTS (COMPRESSOR)
Unit power
supply
Vers.
INVERTER compressor
ON/OFF compressor
Frame
Mod.
V/ph/Hz
V/ph/Hz
Qty.
FLI
(kW)
FLA
(A)
LRA
(A)
[email protected]
V/ph/Hz
Qty.
FLI
(kW)
FLA
(A)
LRA
(A)
2
2
3
3
4
5
6
7
7
12
18
20
29
50
70
90
130
150
230/1/50
400/3N/50
400/3N/50
400/3N/50
400/3N/50
400/3N/50
400/3N/50
400/3N/50
400/3N/50
230/1/50
400/3/50
400/3/50
400/3/50
400/3/50
400/3/50
400/3/50
400/3/50
400/3/50
1
1
1
1
1
1
1
1
1
4
10,1
10,1
16,7
19,02
12,48
20,13
20,13
20,13
25,1
15,4
15,4
25,6
30,44
20,63
32,14
32,14
32,14
2,7
45
45
48
44
44
44
44
44
12,1
3
3
4,7
10,7
10,7
10,7
10,7
10,7
/
/
/
/
/
400/3N/50
400/3N/50
400/3N/50
400/3N/50
/
/
/
/
/
1
1
2
2
/
/
/
/
/
11,9
15,4
11,9
15,4
/
/
/
/
/
24
31
24
31
/
/
/
/
/
142
158
142
158
Unit power
supply
Vers.
INVERTER compressor
ON/OFF compressor
Frame
Mod.
V/ph/Hz
V/ph/Hz
Qty.
FLI
(kW)
FLA
(A)
LRA
(A)
[email protected]
V/ph/Hz
Qty.
FLI
(kW)
FLA
(A)
LRA
(A)
2
2
3
3
4
5
6
7
7
12
18
20
29
50
70
90
130
150
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
/
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
460/3/60
/
1
1
1
1
1
1
1
1
/
10,2
10,2
17,2
19,02
12,48
20,13
20,13
20,13
/
13,4
13,4
22,71
30,44
20,63
32,14
32,14
32,14
/
16
16
17
44
44
44
44
44
/
3
3
4,7
10,7
10,7
10,7
10,7
10,7
/
/
/
/
/
460/3/60
460/3/60
460/3/60
460/3/60
/
/
/
/
/
1
1
2
2
/
/
/
/
/
12,43
14,02
12,43
14,02
/
/
/
/
/
22
24
22
24
/
/
/
/
/
142
142
142
142
Unit power
supply
Vers.
INVERTER compressor
ON/OFF compressor
Frame
Mod.
V/ph/Hz
V/ph/Hz
Qty.
FLI
(kW)
FLA
(A)
LRA
(A)
[email protected]
V/ph/Hz
Qty.
FLI
(kW)
FLA
(A)
LRA
(A)
2
2
3
3
4
5
6
7
7
12
18
20
29
50
70
90
130
150
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
/
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
380/3/60
/
1
1
1
1
1
1
1
1
/
10,1
10,1
16,2
19,02
12,48
20,13
20,13
20,13
/
15,93
15,93
25,64
30,44
20,63
32,14
32,14
32,14
/
16
16
17
44
44
44
44
44
/
3
3
4,7
10,7
10,7
10,7
10,7
10,7
/
/
/
/
/
380/3/60
380/3/60
380/3/60
380/3/60
/
/
/
/
/
1
1
2
2
/
/
/
/
/
12,43
14,02
12,43
14,02
/
/
/
/
/
26
29
26
29
/
/
/
/
/
160
160
160
160
Values for individual component
FLI = Maximum power consumption
FLA = Max current
LRA = Locked rotor current
42
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
POWER CONSUMPTION OF INDIVIDUAL COMPONENTS (FAN)
Vers.
Unit power supply
Frame
Mod.
2
2
Std. EC radial fan
HP EC radial fan
V/ph/Hz
V/ph/Hz
Qty.
FLI (kW)
FLA (A)
V/ph/Hz
Qty.
FLI (kW)
FLA (A)
12
230/1/50
230/1/50
2
0,48
2
230/1/50
2
0,5
3,15
18
400/3N/50
230/1/50
2
0,48
2
230/1/50
2
0,5
3,15
3
20
400/3N/50
400/3/50
1
1,96
3,1
400/3/50
1
2,7
4,3
3
29
400/3N/50
400/3/50
1
1,96
3,1
400/3/50
1
2,7
4,3
4
50
400/3N/50
400/3/50
2
1,96
3,1
400/3/50
2
2,7
4,3
5
70
400/3N/50
400/3/50
3
1,96
3,1
400/3/50
3
2,7
4,3
6
90
400/3N/50
400/3/50
3
2,7
4,3
400/3/50
4
2,7
4,3
7
130
400/3N/50
400/3/50
3
2,75
4,3
400/3/50
3
2,75
4,3
7
150
400/3N/50
400/3/50
3
2,75
4,3
400/3/50
3
2,75
4,3
FLA (A)
V/ph/Hz
Vers.
Unit power supply
V/ph/Hz
2
12
/
/
/
/
/
/
/
/
/
2
18
460/3/60
230/1/60
2
0,48
2
230/1/60
2
0,5
3,15
3
20
460/3/60
460/3/60
1
1,96
3,1
460/3/60
1
2,7
4,3
3
29
460/3/60
460/3/60
1
1,96
3,1
460/3/60
1
2,7
4,3
4
50
460/3/60
460/3/60
2
1,96
3,1
460/3/60
2
2,7
4,3
5
70
460/3/60
460/3/60
3
1,96
3,1
460/3/60
3
2,7
4,3
6
90
460/3/60
460/3/60
3
2,7
4,3
460/3/60
4
2,7
4,3
7
130
460/3/60
460/3/60
3
2,75
4,3
460/3/60
3
2,75
4,3
7
150
460/3/60
460/3/60
3
2,75
4,3
460/3/60
3
2,75
4,3
FLA (A)
V/ph/Hz
Unit power supply
V/ph/Hz
Qty.
FLI (kW)
HP EC radial fan
Mod.
Vers.
V/ph/Hz
Std. EC radial fan
Frame
Std. EC radial fan
V/ph/Hz
Qty.
FLI (kW)
Qty.
FLI (kW)
FLA (A)
HP EC radial fan
Frame
Mod.
Qty.
FLI (kW)
FLA (A)
2
12
/
/
/
/
/
/
/
/
/
2
18
380/3/60
230/1/60
2
0,48
2
230/1/60
2
0,5
3,15
3
20
380/3/60
380/3/60
1
1,96
3,1
380/3/60
1
2,7
4,3
3
29
380/3/60
380/3/60
1
1,96
3,1
380/3/60
1
2,7
4,3
4
50
380/3/60
380/3/60
2
1,96
3,1
380/3/60
2
2,7
4,3
5
70
380/3/60
380/3/60
3
1,96
3,1
380/3/60
3
2,7
4,3
6
90
380/3/60
380/3/60
3
2,7
4,3
380/3/60
4
2,7
4,3
7
130
380/3/60
380/3/60
3
2,75
4,3
380/3/60
3
2,75
4,3
7
150
380/3/60
380/3/60
3
2,75
4,3
380/3/60
3
2,75
4,3
Values for individual component
FLI = Maximum power consumption
FLA = Max current
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
43
POWER CONSUMPTION OF INDIVIDUAL COMPONENTS (HEATERS)
Vers.
Unit power supply
Frame
Mod.
2
2
STD electric heaters
HIGH POWER electric heaters
V/ph/Hz
V/ph/Hz
Qty.
FLI (kW)
FLA (A)
V/ph/Hz
Qty.
12
230/1/50
230/1/50
2
5,4
23,5
230/1/50
18
400/3N/50
230/1/50
2
8
34,8
230/1/50
3
20
400/3N/50
400/3/50
3
9
13
3
29
400/3N/50
400/3/50
3
9
4
50
400/3N/50
400/3/50
5
5
70
400/3N/50
400/3/50
6
6
90
400/3N/50
400/3/50
7
130
400/3N/50
7
150
400/3N/50
Vers.
FLI (kW)
FLA (A)
3
8
34,8
3
12
17,3
400/3/50
5
15
21,7
13
400/3/50
5
15
21,7
15
21,7
400/3/50
6
18
26
18
26
400/3/50
9
27
39
6
18
26
400/3/50
9
27
39
400/3/50
8
24
34,68
400/3/50
12
36
52
400/3/50
8
24
34,68
400/3/50
12
36
52
FLA (A)
V/ph/Hz
Unit power supply
V/ph/Hz
2
12
/
/
/
/
/
/
/
/
/
2
18
460/3/60
460/3/60
2
8,1
10,2
460/3/60
3
12
15,1
3
20
460/3/60
460/3/60
3
9
11,3
460/3/60
5
15
18,9
3
29
460/3/60
460/3/60
3
9
11,3
460/3/60
5
15
18,9
4
50
460/3/60
460/3/60
5
15
18,9
460/3/60
6
18
22,6
5
70
460/3/60
460/3/60
6
18
22,6
460/3/60
9
27
34
6
90
460/3/60
460/3/60
6
18
22,6
460/3/60
9
27
34
7
130
460/3/60
460/3/60
8
24
30,2
460/3/60
12
36
45,2
7
150
460/3/60
460/3/60
8
24
30,2
460/3/60
12
36
45,2
FLA (A)
V/ph/Hz
Unit power supply
V/ph/Hz
Qty.
FLI (kW)
HIGH POWER electric heaters
Mod.
Vers.
V/ph/Hz
STD electric heaters
Frame
STD electric heaters
V/ph/Hz
Qty.
FLI (kW)
Qty.
FLI (kW)
FLA (A)
HIGH POWER electric heaters
Frame
Mod.
Qty.
FLI (kW)
FLA (A)
2
12
/
/
/
/
/
/
/
/
/
2
18
380/3/60
380/3/60
2
8,1
12,3
380/3/60
3
12
18,3
3
20
380/3/60
380/3/60
3
9
13,7
380/3/60
5
15
22,8
3
29
380/3/60
380/3/60
3
9
13,7
380/3/60
5
15
22,8
4
50
380/3/60
380/3/60
5
15
22,8
380/3/60
6
18
27,4
5
70
380/3/60
380/3/60
6
18
27,4
380/3/60
9
27
41,1
6
90
380/3/60
380/3/60
6
18
27,4
380/3/60
9
27
41,1
7
130
380/3/60
380/3/60
8
24
36,5
380/3/60
12
36
55
7
150
380/3/60
380/3/60
8
24
36,5
380/3/60
12
36
55
Values for individual component
FLI = Maximum power consumption
FLA = Max current
44
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
POWER CONSUMPTION OF INDIVIDUAL COMPONENTS (HUMIDIFIER)
Vers.
Unit power supply
Frame
Mod.
2
2
Humidifier modulating
V/ph/Hz
V/ph/Hz
Qty.
FLI (kW)
FLA (A)
kg/h
12
230/1/50
230/1/50
1
2,25
9,8
3
18
400/3N/50
400/3/50
1
3,75
5,5
5
3
20
400/3N/50
400/3/50
1
3,75
5,5
5
3
29
400/3N/50
400/3/50
1
3,75
5,5
5
4
50
400/3N/50
400/3/50
1
3,75
5,5
5
5
70
400/3N/50
400/3/50
1
6
8,7
8
6
90
400/3N/50
400/3/50
1
6
8,7
8
7
130
400/3N/50
400/3/50
1
7,5
11
15
7
150
400/3N/50
400/3/50
1
7,5
11
15
V/ph/Hz
Qty.
FLA (A)
kg/h
Vers.
Unit power supply
Mod.
2
12
/
/
/
/
/
/
2
18
460/3/60
460/3/60
1
3,75
4,7
5
3
20
460/3/60
460/3/60
1
3,75
4,7
5
3
29
460/3/60
460/3/60
1
3,75
4,7
5
4
50
460/3/60
460/3/60
1
3,75
4,7
5
5
70
460/3/60
460/3/60
1
6
7,5
8
6
90
460/3/60
460/3/60
1
6
7,5
8
7
130
460/3/60
460/3/60
1
7,5
9,4
15
7
150
460/3/60
460/3/60
1
7,5
9,4
15
V/ph/Hz
Qty.
FLA (A)
kg/h
Vers.
V/ph/Hz
Humidifier modulating
Frame
Unit power supply
V/ph/Hz
FLI (kW)
Humidifier modulating
Frame
Mod.
FLI (kW)
2
12
/
/
/
/
/
/
2
18
380/3/60
380/3/60
1
3,55
5,7
4,7
3
20
380/3/60
380/3/60
1
3,55
5,7
4,7
3
29
380/3/60
380/3/60
1
3,55
5,7
4,7
4
50
380/3/60
380/3/60
1
3,55
5,7
4,7
5
70
380/3/60
380/3/60
1
5,73
9,1
7,6
6
90
380/3/60
380/3/60
1
5,73
9,1
7,6
7
130
380/3/60
380/3/60
1
7,11
11,4
14,2
7
150
380/3/60
380/3/60
1
7,11
11,4
14,2
Values for individual component
FLI = Maximum power consumption
FLA = Max current
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
45
ELECTRICAL CONNECTION OF THE i-BRE and BRE OUTDOOR AIR-COOLED
CONDENSERS and/or i-BDC and BDC OUTDOOR DRY COOLERS
10V signal, following the logic implemented on the EVOLUTION+
controller.
For the MODULATING version, the voltage signal sent will be
modulated by the condenser controller installed on the indoor
unit, based on instant system requirements.
This ensures optimum operating conditions at all times.
The condenser control unit is also featured as standard on the versions of the indoor units for low outside temperatures (-45°C).
It must be stressed that both the standard air-cooled condensers
and dry coolers supplied by the manufacturer are not fitted as
standard with the condenser fan speed controller, and are only
electrically connected to the disconnect switch for local maintenance operations (for further details, see the manual on the outdoor air-cooled condensers and dry coolers). PTherefore, both of
these outdoor units can be powered directly via the disconnect
switch with primary voltage, however this means their operation
is not controlled. If the STD version of the unit is used together
with the i-BRE remote condenser, or the MODULATING version
fitted with outdoor fan speed control together with the BRE condenser, the power supply to the outdoor air-cooled condenser
and/or outdoor dry cooler can be connected directly from the
indoor unit panel (the connection cable is not supplied by the
manufacturer).
The instructions on the connection and the size of the
power cables are provided by the manufacturer on the
wiring diagram on the indoor unit.
For both single and dual circuit models, just one connection/power cable is required between the indoor and outdoor unit.
For the STD version fitted with condenser control function for iBRE condensers (with EC fans), the fans are managed using a 0 to
For the parameter setting of control condensation phase
cut for BRE-BDC, refer to the controller manual EVOLUTION+.
For connection to the i-BRE / i-BDC outdoor units for fan
speed control, see the instructions shown on the following diagram:
RIMUOVERE I SEGUENTI PONTI TRA I
MORSETTI (REMOVE THE BRIDGE FROM THIS
TERMINAL BLOCK):
QUADRO ELETTRICO UNITÀ ACCURATE
ACCURATE UNIT ELECTRICAL PANEL
USCITA COMANDO VENT.RAD. CONDENSANTE
COND. UNIT SIGNAL
14-15 / 24-25 / 34-35 / 44-45
16-26 / 26-36 / 36-46
17-27 / 27-37 / 37-47
PONTICELLARE I SEGUENTI MORSETTI
(MAKE A BRIDGE IN THIS TERMINAL BLOCK):
13-23 / 23-33 / 33-43
14/24 / 24-34 / 34-44
QS1
37
46
47
NERO (BLACK) 7
36
NERO (BLACK) 6
27
NERO (BLACK) 7
26
NERO (BLACK) 6
17
NERO (BLACK) 7
16
NERO (BLACK) 6
45
NERO (BLACK) 7
44
NERO (BLACK) 6
43
NERO (BLACK) 5
35
NERO (BLACK) 4
34
NERO (BLACK) 3
33
NERO (BLACK) 5
25
NERO (BLACK) 4
24
NERO (BLACK) 5
23
NERO (BLACK) 4
15
NERO (BLACK) 3
14
NERO (BLACK) 5
GND
13
NERO (BLACK) 4
N4
NERO (BLACK) 3
L4
BLU (BLUE)
PE
MARRONE (BROWN)
N3
BLU (BLUE)
L3
G/VERDE (Y/GREEN)
PE
MARRONE (BROWN)
N2
G/VERDE (Y/GREEN)
L2
BLU (BLUE)
PE
MARRONE (BROWN)
BLU (BLUE)
N1
G/VERDE (Y/GREEN)
L1
MARRONE (BROWN)
G/VERDE (Y/GREEN)
PE
SIGNAL 0...10VDC
SEZIONATORE i-BRE
i-BRE DISCONNECTIONG SWITCH
NERO (BLACK) 3
ALIMENTAZIONE CONDENSANTE 1
CONDENSING UNIT 1 POWER SUPPLY
M
1fi
EV4
M
1fi
EV3
M
1fi
EV2
M
1fi
EV1
46
EN
Example of outdoor unit with 4 fans
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
VACUUM AND CHARGE
The refrigerant circuits of the water-cooled chillers and air-conditioners are already charged with refrigerant, either R410A or
R410A (check the rating plate on the unit and the compressors
to see which type of refrigerant is used).
The air-cooled air-conditioners (i-AX - i-AD) and the BRE units
that require refrigerant connections to other units are precharged with nitrogen (or dry air) to prevent moisture from
entering the circuit; in this case, the refrigerant charge must be
completed by the installer, following the instructions shown in this
paragraph.
Refrigerant
R410A (POE)
Type of oil
mod. 12-18-20-29
mod. 50-70-90-130-150
FV50S
160SZ
R410A
Open any valves in the unit or in the system to ensure that all the components are involved in the emptying operation;
Connect a high efficiency vacuum pump to the Schrader fittings or to the 1/4" SAE fittings on the compressor suction and discharge side;
Connect a cylinder of refrigerant to the charge fittings.
Empty the lines, ensuring an absolute pressure of less than 10 Pa (0.07 mm Hg) so as to remove the air and any traces of moisture
Praticare il vuoto nelle linee mantenendo a lungo una pressione inferiore a 10 Pa assoluti (0,07 mm Hg) per evacuare l’aria e le eventuali
tracce di umidità.
The circuit should be emptied slowly and maintained for an extended period, rather than performed too quickly.
Wait a "go up time" of 100 seconds and verify that the pressure does not exceed over 200 Pa absolute.
In general, if there is the chance of significant moisture content in the circuit or for very large systems, the vacuum must be “broken” with
nitrogen dioxide and then repeat the emptying operations as described.
Break the vacuum by pre-charging from the cylinder of refrigerant.
After having started the compressor, complete the charge slowly, until the pressure stabilises in the lines and the gas bubbles disappear
from the flow indicator;
The charge must be checked at the environmental design conditions and with a discharge pressure of around 28 bar (R410A (equal to a
dew point of 48°C and boiling point of 43°C); for units with on-off condenser control, partially close the intake to stop the condenser
fan from repeatedly starting-stopping.
Make sure that the subcooling of the liquid at the thermostatic valve intake is between 3 and 5°C less than the condensing temperature
read on the pressure gauge and that the superheating of the vapour at the evaporator outlet is around 5 °C.
If a circuit already charged with refrigerant needs to be emptied, the first operation required is the removal of the refrigerant from the circuit using a special appliance with dry compressor for recovering the refrigerant. If available, also switch on the sump heaters during the
emptying operation.
COMMISSIONING PROCEDURE
Arm the cutout in the auxiliary circuits;
Arm all the cutouts on the electrical panel;
Power up the air-conditioner electrical panel and close the main
disconnecting switch on the unit (position 'I');
Check that the control board is powered; Check that both the
LEDs relating to the phase sequence relay (RSF) are on; the yellow LED indicates power, the green LED indicates that the
sequence of phases is correct.
If the green LED is off, disconnect power supply from the units,
reverse two phases of the power cable and restart the commissioning procedure. (In the units with sump heaters)
After having powered up the air-conditioner, wait at least 12
hours before starting so as to suitably heat the oil in the compressors. During extended shutdown there may be spontaneous
migration of refrigerant to the compressor sump, which at the
start may cause the oil to foam and consequent damage due to
insufficient lubrication.
As a result, do not disconnect power during weekly pauses;
Open the on-off valves in the refrigerant circuits and check that
the air-cooled remote condensers are connected (air-cooled
models); Check that the external radiators are connected and
make sure there is water flow for cooling (water-cooled models);
Check that the sections of corrugated pipe with the function of
drain trap (both inside and outside of the air-conditioner) have
been filled with water during installation.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
AT LEAST 12 HOURS AFTER POWER UP:
Start the air-conditioner using the buttons on the user terminal;
If an alarm is activated refer to the controller instruction
manual.
EN
47
OPERATION AND CONTROL
WATER-COOLED UNITS
Water in an open circuit
If the temperature of the cooling water is not controlled and may fall
below 25°C, a pressure control valve is required (available as an
accessory) for each condenser; in this case, the supply pressure must
not be less than 200 kPa (2 bar).
IMPORTANT: for systems in which the water is cooled using a
cooling tower, make sure suitable filters are used, to prevent the
plate condensers from fouling quite quickly.
Remember that the units are supplied without the system circulating pump.
25 °C
Water in a closed circuit
The condensers on the units are supplied with water pumped in a
closed circuit and cooled by external radiators; check that the
cross-section of the pipes and that the characteristics of the circulating pump are suitable: an insufficient water flow-rate affects
the performance of the air-conditioner. The temperature of the
cooling water must be controlled so as to not fall below 25°C,
preferably according to the diagram shown in the figure.
Remember that the units are supplied without the system circulating pump.
IMPORTANT: the cooling water must contain a percentage
of ethylene glycol (passivated and consequently non-corrosive) according to the minimum expected outside temperature. In the Energy Saving models, the use of glycol is always
required.
ELECTRONIC VALVE
The INVERTER units come with electronic expansion valves as
standard.
These valves have a much wider modulation capacity than traditional mechanical thermostatic valves; this feature is essential in
applications with operation at part load.
The electronic expansion valve does not require calibration in the
field, as all the parameters are set directly in the factory.
48
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
INSTRUMENTS AND ALARMS
The air-conditioner is fitted with the following instruments:
- High pressure switch/switches with manual reset (one on
each refrigerant circuit);
- Low pressure switch/switches with automatic reset (one
on each refrigerant circuit);
- Air flow sensor and dirty filter sensor (differential pressure
switches);
- Temperature sensor or room temperature and humidity sensor (on the units with humidity control);
- Outlet air limit temperature sensor
In addition, the following optional devices may be available:
- Flood sensor made up of:
a) device to be inserted in the special socket on the electrical
panel;
b) Floor sensor (or sensors, connected in parallel) to be positioned at the points monitored;
- Fire and smoke sensors;
- Hot water temperature sensor, for reading and enabling
post-heating with hot water;
Some versions, in addition, have the following sensors:
- Safety thermostat (in the versions with electric heaters),
with the reset button accessible on the right-hand side of the
electrical panel.
1 main board
2 disconnecting switch
3 electric heaters
4 radial fan and inverter
5 compressor
6 dewatering filter
7 liquid valve
8 flow indicator
9 thermostatic valve
10 humidifier
11 dehumidification valve
12 hot water coil valve
13 temperature-humidity probe
3
4
2
1
8
13
9
7
11
10
5
6
12
The pressure test points for the air flow and dirty filter differential pressure switches are connected in parallel; (on OVER units)
- the positive pressure test point is located on the right-hand
side of the base of the unit;
- the negative pressure test point is located in a position for
measuring the pressure upstream of the fan; (on UNDER units)
- the positive pressure test point is located behind the electrical
panel, upstream of the air filter;
- the negative pressure test point is located in a position for
measuring the pressure upstream of the fan.
Pressure
test point
Pressure
test point
Q.E.
Q.E.
FRONT OF
THE UNIT
FRONT OF
THE UNIT
Pressure
test point
Pressure
test point
RIGHT-HAND SIDE
RIGHT-HAND SIDE
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
49
CALIBRATING THE CONTROL AND SAFETY DEVICES
After starting the air-conditioner, make the following adjustments
- Room temperature (cooling and heating set point).
- Relative humidity (set point for humidification and dehumidification);
- Dirty filter differential pressure switch: see the paragraph on
"CALIBRATING THE DIRTY FILTER SENSOR".
Symbol
Description
High pressure switch
F1
Low pressure switch
Safety thermostat (versions T and H)
F2
TH1
Models
12
18
20
29
50
70
90
130
150
All
All
The calibration values of the control and safety devices must not
be altered.
Activation
Differential
Reset
-
Manual reset
0,9 bar
-
3,9 bar (automatico)
Manual reset
37,4 bar (opening)
40,5 bar (opening)
3,0 bar (opening)
320 °C (opening)
CALIBRATING THE PRESSURE CONTROL VALVE
(option available for water-cooled models)
The pressure control valve, by managing the flow of water, prevents the condensing pressure from lowering excessively and, at
the same time, saves water consumption.
If the pressure control valve needs to be calibrated, use the
adjustment knob (the pressure increases when turning it clockwise) until the condensing pressure stabilises at the recommended value of 27 bars (equivalent to a temperature of around 45°C
with R410A), checked using a pressure gauge connected to the
pressure test point on the outlet valve.
50
EN
1
2
3
4
5
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
CALIBRATING THE AIR FLOW SENSOR
The differential pressure switch F3 must be activated if the fan is
not working (when there is one fan) or one of the fans is not
working. As the difference in pressure between the fan intake and
outlet depends on the air flow-rate, the instrument may need to
be recalibrated after installation, checking that the contact closes
when the fan is operating normally.
To calibrate the pressure switch:
• simulate a fault in the fan system (stop the fan - if there is just
one - or one of the fans on the unit) and check that the pressure switch is activated;
• if the device is not activated, progressively increase the calibration value of the pressure switch.
Pressure test points
+
-
A
To calibrate the pressure switch, remove the plastic cover (A) by
unscrewing the two screws (B).
Use the adjustment screw (E) to calibrate the differential pressure
switch on a scale from 0.5 to 4.0 mbar (50 to 400Pa).
If having to replace the pressure switch, unscrew the two fastening screws (D), remove the rubber hoses connected to the pressure test points (+) and (-) and remove the electrical cables connected to terminals 1, 2 and 3.
To install the new pressure switch, perform the same operations
in the reverse order, inserting the cables from point (C).
B
D
1
E
3
mbar
mbar
2
B
C
D
CALIBRATING THE DIRTY FILTER SENSOR
Pressure switch F4 must be calibrated according to the pressure
drop, which depends not only on the filter being dirty, but also on
the air flow-rate.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
The calibration must be performed with a clean filter, as follows:
- switch the unit on
- progressively cover the surface of the air filter and make sure
that the pressure switch is activated when around 50-60% covered;
- if the device is not activated, progressively reduce the calibration of the pressure switch;
- if the device is activated too early, increase the calibration.
EN
51
TEMPERATURE AND HUMIDITY PROBE
The figure shows the optional temperature and humidity probe.
If having to replace the probe, release the white plastic cover by
pressing point (A) with a screwdriver or a pointed object; lift the
cover (B) to access the fastening screws (C) and the terminals
(D).
For the probe electrical connection use a shielded cable; the connections to the terminals on the board are shown on the wiring
diagram.
B
D
A
C
80
H
M
T
OUT
OUT
+
126 mm
Shielded cable
inlet
Fastening
holes
SERVOMOTOR AND WATER VALVE
WARNING: Disconnect power before working on the
servomotor
On the controllers units ACCURATE the position of the servomotor is proportional to the control voltage, between 0 and 10
Vdc. The servomotor stops:
- automatically at the end of its travel;
- in the position of equilibrium, corresponding to the control
voltage;
- in the current position, when cutting off power.
OPERATION OF THE MVX52 - 0÷10V SERVOMOTORS
The opening of the valve can be controlled by checking the position using the indicator located on the top of the servomotor
2
IN
OUT
EMERGENCY MANUAL OPERATION
The valve can be operated manually, in the event of faults to the
servomotor or the control system, using the manual control knob
(not supplied).
52
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
Type
SSB81
SSB61
Rated voltage
AC 24 V
AC/DC 24 V
Description
This actuator with 3point or 0÷10V signal is adapt for 2 or 3
way valve with 5,5mm stroke
Run time at 50 Hz
150 s
75 s
Control signal
3-position
DC 0...10 V
Manual override
3 mm
A
DC 0...10 V control signal SSB61
• The valve opens / closes in proportion to the control signal at Y.
• At DC 0 V, the valve is fully closed (A ? AB).
• When power supply is removed, the actuator maintains its current position.
Operation
A 3 mm hexagonal socket wrench can be used to move the actuator to any position between 0 and 1. If a control signal from the
controller is present, then this takes priority in determining the
position.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
3 mm
0
1
0
4891Z13
Position indicator in
position 0:
Valve closed
(Y, Y1) A
3-position control signal SSB81
• Voltage at Y1: Stem extends Valve opens
• Voltage at Y2: Stem retracts Valve closes
• No voltage at Y1 and Y2: Actuator maintains its current position.
B
m
3m
Function
When the actuator is driven by DC 0…10 V control voltage or by
a 3-position signal, it produces a stroke which is transmitted to
the valve stem. The description of operation in this document
applies to the valve versions which are fully closed when deenergized (NC).
1
4891Z14
Position indicator in
position 1:
Valve open
B (Y,Y2)
Maintenance
The actuators are maintenance-free. When carrying out service
work on the plant, following must be noted:
• If necessary, disconnect electrical connections from the terminals!
• The actuator must be commissioned only with a correctly
mounted valve in place!
Repair
SSB... actuators cannot be repaired; the complete unit must be
replaced.
EN
53
Type
SSB81
SSB61
Rated voltage
AC 24 V
AC/DC 24 V
Description
This actuator with 3point or 0÷10V signal is adapt for 2 or 3
way valve with 5,5mm stroke
Function
When the actuator is driven by a 3-position or DC 0…10 V
control signal, it generates a stroke which is transmitted to
the valve stem.
Run time at 50 Hz
150 s
75 s
Manual override
The rotary knob can be used to drive the actuator into any
position between 0 and 1.
However, if a control signal from the controller is present, this
will take priority in determining the position.
A
B
Auto calibration - SSC619
When the AC / DC 24 V supply is applied for the first time,
the actuators calibrate themselves independent of the control
signal. In this process, the actuator drives the valve to the
mechanical end stops and stores the associated positions permanently in the form of electronic values. The positioning signal is only active on completion of this calibration process.
Calibration takes about 60 seconds.
A
B
1
0
3-position actuators SSC819
• Voltage at Y1: Actuator stem extends and valve opens
• Voltage at Y2: Actuator stem retracts and valve closes
• No voltage at Y1 or Y2: Actuator maintains the current position
DC 0...10 V control - SSC619
• The valve opens / closes in proportion to the control signal at Y
• At DC 0 V, the valve is fully closed
• In the event of a power failure, the actuator maintains its current position
Control signal
3-position
DC 0...10 V
1
(Y, Y1)
A
B
0
(Y2)
Position indicator in
position 1 = OPEN
Position indicator in
position 0 = CLOSED
Maintenance
When servicing the actuator:
• Switch off power
• If necessary, disconnect the terminals
• The actuator must only be commissioned with a correctly
mounted valve in place!
Repair
The SSC ... actuators cannot be repaired. They must be
replaced as a complete unit.
1
2
3
54
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
Description
This actuator with 3point or 0÷10V signal is adapt for 2 or 3 way valve with 20mm stroke
SQX82:
SQX62:
2
3
4
5
1
1
Terminal strip
SQX82...
3-position positioning signal
• Voltage on Y1: actuator stem extends, valve opens
• Voltage on Y2: actuator stem retracts, valve closes
• No voltage on Y1 and Y2: actuator stem remains in the respective position
2
3
4
5
Button S3 (calibration)
LED, red / green (operating status indication)
Terminal strip
DIL switches:
S1: change-over flow characteristic «LOG» / «LIN» *)
S2: change-over signal R «0-10 V, 4-20 mA» / «1000Ω» *)
(*) bold print = factory setting
SQX62...
Signals: DC 0-10 V
The SQX62 is either controlled via terminal Y.
The recorded positioning signals control the synchronous
motor by means of microprocessor electronics.
• Signal Y increasing: actuator stem extends, valve opens
• Signal Y decreasing: actuator stem retracts, valve closes
• Signal Y constant: actuator stem remains in the respective
position
Calibration SQX62
The minimum stroke of the valve is 15 mm. The LED does not indicate a calibration error when the stroke is < 15 mm
The stem extends to the maximum position with the maximum positioning signal DC 10 V.
Calibration
1. Pressing button S3 starts calibration
2. Actuator moves to «0 %» stroke position (valve closed)
3. Actuator moves to «100 %» stroke position (valve open)
4. Measured values saved in microprocessor
Normal operation
5. Actuator moves to the position as indicated by signal Y
green LED flashes
green LED is lit permanently
A flashing red LED indicates a calibration error.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
EN
55
Indication of operating state SQX62
LED
Indication
Function
Remarks, troubleshooting
Lit
Control mode
Automatic operation; everything o.k.
Flashing
Calibration
Wait until calibration is finished
Lit
Internal error
Troubleshooting, eventually replace actuator
Flashing
Calibration error
Dark
No power supply
Electronics faulty
Green
Red
Both
Troubleshooting, recalibrate
(operate button S3 1x)
Check mains network, check wiring
Replace actuator
2 WAY VALVE CLOSE-OFF
For applications where the 2 way valve is needed, verify the Close Off value in table below if they are suitable with the system.
For different value, make specific request.
FRAME
3
4
5
6
7
i-AT/i-AD MODEL
29
50
70
90
130
2 WAY VALVE CLOSE-OFF
Actuator
Valve model
SSC
VXP
SSC
VXP
SSC
VXP
SSC
VXP
SQX
VXG
KVS
10
16
25
25
40
close off* (kPa)
300
175
75
75
300
*close off = Maximum permissible differential pressure at which the motorised valve will close securely against the pressure
56
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
ELECTRIC HEATERS
ELECTRIC HEATERS
The overall power of the electric heaters is divided into a number
of elements, each with a power of 2÷3÷4 kW.
The colour of the wires on each element has the following meaning:
• BLACK wire = low power element (0,7÷1÷1,3 kW);
• WHITE wire = high power element (1,3÷2÷2,7 kW);
• RED wire = common.
The wires for each element are connected to contactors KM5
and KM6 on the electrical panel so as to balance the load
between the phases and create three stages of power (see the
wiring diagrams on the unit).
If having to replace the electric heaters, disconnect power to the
air-conditioner and wait until the heating elements have cooled
down. After having replaced the heaters, make sure the earth is
connected.
HUMIDIFIER
SYSTEM COMPONENTS
Upon request, the air-conditioning unit can be fitted with an immersed electrode humidifier (versions D and H).
3
4
1
2
Humidifier interface board: A3; (inside the electrical panel).
Current transformer TA1 (inside the electrical panel) for
measuring the current input of the steam cylinder.
3 Water fill tank.
4 High water level electrodes in the steam cylinder.
5 Overflow pipe (BEHIND THE CYLINDER).
6 Boiler cylinder (or steam cylinder).
7 Water fill solenoid valve:YV1.
8 Cylinder drain solenoid valve:YV2.
9 Microprocessor control board:A1.
10 Temperature and humidity probe: BH1.
6
KM4
2. TA1
3
4
7
1. A3
9. B1
5
7. YV1
6.
8. YV2
10. BH1
8
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EN
57
HUMIDIFIER OPERATING PRINCIPLE
In the immersed electrode humidifier, the current that runs
between the electrodes, through the water contained in the boiler cylinder, generates the heat required to boil the water.
By controlling the level of the water and the concentration of
salts inside the steam cylinder (6) using the fill (7) and drain (8)
solenoid valves, the amount of current delivered can be regulated,
and measured using a current transformer (2).
When steam production is required, the humidifier contactor CU
closes (see the wiring diagram) so as to supply power to the
immersed electrodes.
When the current falls below the set value due to the lowering of
the water level, the fill valve (7) is opened.
The drain valve (8) is activated cyclically, depending on the characteristics of the supply water, so as to maintain the optimum salt
concentration inside the cylinder (6).
The only periodical maintenance operations required are the
inspection and cleaning of the parts in the steam production unit.
The operations indicated below should be performed annually,
preferably before shutting down the unit in summer.
STEAM CYLINDER
The steam cylinder requires periodical cleaning to remove the
scale deposits that form on the surface of the electrodes and the
flakes that deposit on the filter at the base of the cylinder.
To remove the cylinder, proceed as follows:
• completely drain the water from the boiler; to do this, see the
paragraph “MANUAL CONTROL” in the EVOLUZIONE controller instruction manual;
• disconnect the power supply by opening the main switch on the
electrical panel;
• remove, from the top of the cylinder, the hose that carries the
steam to the distributor;
• disconnect the power connections by unscrewing the knobs on
the cable ends and remove the plugs from the level electrodes;
• release the strap that secures the cylinder to the unit;
• slide the cylinder out upwards.
The steam cylinder can be reused a number of times after cleaning the electrodes: if, however, the wear on the grills of electrodes
is such that these cannot be regenerated, they must be replaced.
The only spare part is the complete cylinder body (with filter
included).
FILL AND DRAIN ASSEMBLIES
To ensure the correct operation of the humidifier, the supply/fill
and drain assemblies need to be inspected periodically.
Proceed as follows:
- completely drain the water from the boiler using the MANUAL
CONTROLS on the controller A1;
- disconnect the power supply by opening the main switch on the
electrical panel;
- remove the fill pipe from the 3/4 GAS fitting on the fill solenoid
valve;
- remove and clean the filter located inside the solenoid valve fitting;
- dismantle the drain assembly, clean the pipes and remove any
flakes of scale from the cup-drain trap.
58
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
HUMIDIFIER POWER SUPPLY
Underneath the fill solenoid valve on the steam production unit is
the threaded male fitting (V) for the humidifier water supply.
This is already fitted with a plastic hose, diameter 6 mm, for connection to the building's water supply (see figure, point F).
OUT
Ø 32mm
position:V-F
V: Steam production unit - inlet connection (threaded male fitting 3/4”G);
F: Rubber hose, diameter: Ø 6mm.
To supply the humidifier, use drinking water without any chemical
treatment or demineralisation.
The characteristics of the water that supplies the humidifier must
be within the following values:
IN
3/4”G
Ø 6mm
LIMIT VALUES FOR IMMERSED ELECTRODE HUMIDIFIER FEED WATER WITH
MEDIUM-HIGH CONDUCTIVITY
Mains pressure
bar
Hydrogen ions
pH
Specific conductivity at 20°C
μS/cm
σR, 20 °C
Total dissolved solids
TDS
mg/l
Dry residue at 180°C
R180
mg/l
Total hardness
TH
mg/l CaCO3
Temporary hardness
mg/l CaCO3
Iron + Manganese
mg/l Fe + Mn
Chlorides
ppm Cl
Silica
mg/l SiO2
Residual chlorine
mg/l ClCalcium sulphateo
mg/l CaSO4
Metallic impurities
mg/l
Solvents, diluents, soaps, lubricants
mg/l
LIMITS
Min
1
7
300
(1)
(1)
100(2)
60(3)
0
0
0
0
0
0
0
Max
8
8,5
1250
(1)
(1)
400
300
0,2
30
20
0,2
100
0
0
(1) Values depending on specific conductivity; in general: TDS ≅ 0,93 * σ20; R180 ≅ 0,65 * σ20
(2) not lower than 200% of the chloride content in mg/l of Cl(3) not lower than 300% of the chloride content in mg/l ofClThe cylinder supplied as indicated in the price list refers to the model for medium conductivity (350...750 µS/cm).
Models are available upon request for low conductivity (125-350 µS/cm) or high conductivity (750-1250 µS/cm).
Contact the office to a specific quotation.
HUMIDIFIER AND CONDENSATE DRAIN
Underneath the drain solenoid valve on the steam production
unit is an attachment for draining the water.
This is already fitted with a hose coupling for connecting the hose
running to the sewerage system in the building.
A rubber or plastic hose should be used, resistant to 100°C, with
an inside diameter of 32 mm.
Fit a trap in the section of the hose outside of the unit to avoid
bad odours and to prevent water from overflowing from the
humidifier pan.
During installation, pour water into the condensate collection pan
and the humidifier pan, so as to fill the drain traps outside and
inside the unit with water.
Downstream of the drain trap ensure a minimum slope of 1%.
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WARNING: the water exiting the steam cylinder is very hot.
The humidifier drain hose must not be fastened to electrical
cables and must run down vertically so as to avoid any contact
with these cables.
EN
59
CONDENSATE DRAIN PUMP AND HUMIDIFIER DRAIN PUMP
Depending on the version, a condensate drain pump is available
(for versions B and R) or a humidifier drain pump (for versions H
and T) with mechanical features such as to be able to resist the
high temperatures of the water exiting the steam cylinder.
The pump must be located below the drain fitting, according to
the instructions contained in the packaging.
Check that the head is sufficient to lift the condensate to the
point of drainage.
STD CONDENSATE DRAIN PUMP (LOW WATER TEMPERATURE)
Technical specifications:
Tank capacity: 2 litres
Recommended maximum head: 4.6 m
Maximum water flow-rate: 288 l/h with zero head
Rated power: 0.6 A, 230 VAC
Noise level ≤ 60 dB with maximum head
Shutdown protection on overheating with auto-reset thermal relay
Maximum drain water temperature: 50°C
Non-return valve as standard
Power cable and alarm cable supplied (2 m long)
Frame with drilled rear plate for wall mounting
Two inlet openings to connect multiple units (25 mm)
Transparent cover for quick inspection
Made from fire resistant plastic
Safety switch: max 4 A
Dimensions:
Height: 170 mm
Width: 235 mm
Depth: 140 mm
Weight: 1.75 kg
Electrical connections:
Brown: Line
Blue: Neutral
Green/yellow: Earth
Black: N/C
Black: Common
Installation notes
This pump is designed to be installed only horizontally, resting the
base on a perfectly flat, horizontal surface or fastening it horizontally to the wall through the holes provided on the frame.
The pump requires a drain hose with an inside diameter of 6 mm
or 9 mm.
IMPORTANT:
1) The safety switch should always be used
2) The drain pump should be powered separately from the unit
that produces the condensate, so as to allow the pump to continue draining the water even if the unit itself shuts down.
Maintenance guide
At least once every 6 months, pour a bactericidal solution into
the tank, to prevent accumulation of residues and sludge at the
bottom.
These substances may cause the float to malfunction or block the
non-return valve that the drained water flows through.
STD CONDENSATE PUMP PERFORMANCE
300
FLOW-RATE IN LITRES/HOUR
The pumps with tank are designed to collect the condensate produced by the air-conditioning unit.
These start automatically when the float rises and have a discharge head of 4 metres.
The pump is fitted with two switches, activated by a float system.
One is used to start the centrifugal pump, and the other is used
as a high level safety switch.
The top part of the pump is made from transparent plastic, for
quick and easy inspection of the internal components, and is supplied with a 2 metre long cable with push-in quick coupling to
simplify installation and maintenance.
In any case, the pump with tank must be installed below the
source of condensate.
Make sure the hoses are not choked or twisted along the path
between the pump and the point of drainage.
Securely fasten the hoses with a clamp to the pump outlet fitting,
to prevent them from coming loose and consequently causing
water to be released at high pressure.
250
200
150
100
50
0
0
1
2
3
4
5
HEAD IN METRES
NB: Users must check that any chemicals contained in the condensate are compatible with operation of the pump.
• Do not use the pump to drain water at temperatures exceeding
50 °C.
• Do not use with demineralised water (this has been proven to
damage the mechanical parts of the pump)
IMPORTANT:
Test pump operation by filling it with water until the motor
starts, to check for any leaks and verify correct drainage of the
water.
SAFETY SWITCH
BLACK
BLACK
PUMP
MOTOR
PUMP START
SWITCH
LINE
NEUTRAL
EARTH
PUMP FRAME
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EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
CONDENSATE DRAIN PUMP FOR HIGH WATER TEMP. (HUMIDIFIER)
SAFETY SWITCH
BLACK
BLACK
PUMP
MOTOR
LINE
NEUTRAL
EARTH
PUMP START
SWITCH
PUMP FRAME
Technical specifications:
Tank capacity: 4 litres
Recommended maximum head: 6 m
Maximum water flow-rate: 900 l/h with zero head
Rated power: 0.6 A, 230 VAC
Power cable (2 m long)
Safety switch: max 4 A
Power supply voltage 220/240 VAC
Current draw: 0.7 A
Power consumption: 175 W
Dimensions
Height: 205 mm
Width: 300 mm
Depth: 150 mm
Weight: 3.6 kg
Electrical connections
Brown: Line
Blue: Neutral
Green/yellow: Earth
2 x black: Safety switch
Maintenance guide
At least once every 6 months, pour a bactericidal solution into
the tank, to prevent accumulation of residues and sludge at the
bottom that may cause the pump to malfunction.
NB: Users must check that any chemicals contained in the condensate are compatible with operation of the pump.
IMPORTANT: Test pump operation by filling it with water until
the motor starts, to check for any leaks and verify correct
drainage of the water.
FLOW-RATE IN LITRES/HOUR
These pumps are designed to collect the hot water produced by
the humidifier drain cycles, as well as the condensate produced.
The pump body is made from Cycoloy, a heat-resistant material,
the pre-wired safety float is a low voltage switch used to stop the
drain cycle in the unlikely event where the pump malfunctions.
The pump is started by internal float switches.
1400
1200
1000
800
600
400
200
0
1
2
3
4
5
6
7
8
9
10
HEAD IN METRES
Installation notes:
This pump is designed to be installed only horizontally, resting the
base on a perfectly flat, horizontal surface or fastening it horizontally to the wall through the holes provided on the frame.
The pump requires a drain hose with an inside diameter of 9 mm.
Make sure the hoses are not choked or twisted along the path
between the pump and the point of drainage.
Securely fasten the hoses with a clamp to the pump outlet fitting,
to prevent them from coming loose and consequently causing
water to be released at high pressure.
IMPORTANT:
The pre-wired safety switch must always be used.
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EN
61
DOUBLE POWER SUPPLY WITH AUTOMATIC SWITCHING
The motorised changeover switches automatically manage
changeover under load between two single-phase or three-phase
power supplies, or manually for emergency operations.
These transfer switching (TSE) devices are suitable for low voltage systems with interruption of the supply to the load during
transfer.
• The model supplied in the automatic version checks the source
and switches over automatically, based on the configurable parameters indicated below:
Hexagonal Metric
Allen size 4
44,1 lb-in 5,0 Nm
AUT
Click
Hexagonal Metric
Allen size 5
Max 88,2 lb-in 10 Nm
4 mm min
3/16" min
8 mm max
5/16" max
10 to 70 mm2
# 8 to # 00 AWG
6 to 50 mm2
# 10 to # 00 AWG
15 mm / 0,59 "
230/127 Vac MODEL
400/230 Vac MODEL
+∆U/ +∆F
+∆U/ +∆F
HYST
Un
HYST
C
AUT
AUT
AUT
∆U : 5 → 20%
∆F : 3 → 10%
HYST : 20% ∆U/F
Un (P-P) : 380 → 420 Vac
Un (P-N) : 220 → 240 Vac
50 Hz
10
AC E G
6
60 Hz
A: 3P
B: 1P
E:
F:
C: 50Hz
D: 60Hz
G:
H:
5 3
V
B DF H
E
20
5
D
F
HYST
-∆U/ -∆F
∆U : 5 → 20%
∆F : 3 → 10%
HYST : 20% ∆U/F
OFF
FAULT OK WAIT !
Un
-∆U/ -∆F
Un (P-P) : 208 → 240 Vac
Un (P-N) : 120 → 138 Vac
ON
HYST
Un
%
U
PP
PN
10
10
3
20
0
F
s
60
MFT
0
min
AUT
30
CLIC !
MRT
RESET SOFT
= 2s
U/F
HYST
U/F
HYST
ON
OFF
TEST
MODE 1
MODE 2
HYST
MFT
MFT : 0 → 60 sec.
62
EN
HYST
MRT
MRT : 0 → 30 min.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
MAINTENANCE
Every components replacement (compressor, safety pressostat, liquid receiver, ecc.) have to consider the main component list enclosed in the unit.
This section, aimed above all for the end user, is extremely important for the correct operation of the appliance.
Just a few operations completed scrupulously and regularly will
avoid serious damage to the components. Only authorized and
specialist personnel can operate into the units.
The maintenance operations can be summarised as follows:
- Clean the air filter.
- Check and clean the condenser coils
- Check the water-cooled condensers for fouling.
- Check and clean the drains.
- Check the humidification system.
- General examination of the overall operation of the appliance.
- Visual check of the condition of the pressurised containers.
Cleaning the air filter
The gradual fouling of the filters reduces the flow-rate of the conditioned air, with a consequent reduction in cooling capacity.
In the direct expansion units, a reduction in the air flow-rate may
cause the activation of the low pressure switch and/or cause serious damage to the compressor.
This can be avoided by the periodical cleaning of the filters.
The frequency at which the filters must be checked exclusively
depends on the amount of dust in the environment.
In any case, the following are recommended:
- Every week check that the filters are clean
- Every two weeks clean the filters with a vacuum cleaner
- Every month wash the filters with soapy water
- Every 6 months replace the filters.
It is clear that the recommended times are purely indicative, and
in some cases it may be necessary to increase the frequency of
the checks and maintenance operations.
These operations must be carried out with the unit off and after
having made sure that the appliance is disconnected from the
power supply.
Checking and cleaning the condenser coils
In the hotter period, when the unit operates at maximum capacity, the condensing coils must be able to offer the maximum heat
exchange. Normally installed outside or communicating with the
outside, these may pick up dirt such as paper, dry leaves and dust,
thus reducing the heat exchange.
Make sure that this situation does not arise.
Failure to perform maintenance will cause the activation of the
high pressure switch and the unit to shutdown.
Frequently check the condition of the heat exchanger during the
poplar pollination period or the autumn (falling leaves).
Remove any objects accumulated on the coil and wash with a jet
of water. These operations must be carried out with the unit off
and after having made sure that the appliance is disconnected
from the power supply.
Checking the water-cooled condensers for fouling
To check the water-cooled condensers for fouling, simply check
the water inlet and outlet temperature and compare it against the
condensing temperature.
Normally, for good heat exchange, the difference between the
water outlet temperature and the condensing temperature must
be 5.8°C. Increases in these values, over time, indicate a reduction
in efficiency and consequently the fouling of the condenser.
The condenser is cleaned by chemical washing and must be performed by specialist personnel. This operation must be carried
out with the unit off and after having made sure that the appliance
is disconnected from the power supply).
Checking and cleaning the drains
All the water drains (humidifier and condensate) must ensure
perfect drainage, to avoid flooding in the room.
When the humidifiers drain the water, they discharge a quantity
of lime scale that depends on the hardness of the supply water.
This lime scale may accumulate in the bottom of the drain hose
and block the flow of water. If cleaning is required, add ordinary
descaler to the section of circuit involved. This operation must be
carried out with the unit off and after having made sure that the
appliance is disconnected from the power supply.
Checking the drive belt
On the units with fans coupled to the electric motor by pulleys
and drive belts, after a certain number of operating hours the belt
may become loose, sliding on the pulleys and causing excessive
wear. This situation, if it persists, causes overheating and consequently the breakage of the belt. Loosening can be resolved using
the special belt tightener fitted on the appliance (this operation
must be carried out with the unit off and after having made sure
that the appliance is disconnected from the power supply). Check
the tension of the drive belts once a month. Avoid excessively
tightening the belts, as this may cause damage to the bearings.
General examination of operation
This is a general examination aimed at comparing the operation
of the appliance with the last check performed. Consequently, any
differences in the operating characteristics over time can be highlighted. A detailed and periodical visual check of the appliance and
general cleaning are always important to ensure correct operation. The above-mentioned operations can in general be performed once a month. Naturally, in special situations and specific
installations the frequency may change. A well maintained system
is unlikely to cause disruptions and stoppages to the production
cycles. After 10 years working a complete checking is recommended.
Visual check of the condition of the pressurised containers
Check the condition of the pressurised containers at least once a
year (if these are fitted). It is very important to check that rust
does not form on the surface, that there is no corrosion and that
there are no visible deformations. If not controlled and stopped,
surface oxidation and corrosion will over time cause a decrease
in the thickness of the container and a consequent reduction in
its mechanical strength. Protect with paint and/or corrosion
proofing products. In the event of visible deformations, stop the
unit and contact the nearest service centre.
DISMANTLING
IMPORTANT INFORMATIONS FOR CORRECT DISMANTLING OF THE UNIT
ACCORDING TO CE 2002/96/CE
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
If the unit has to be dismantled, this operation must be done by
suitable local authority. The correct dismantling avoids any negative enviromental consequences and allows significant benefits in
terms of energy saving and resource.
EN
63
TROUBLESHOOTING
Troubleshooting is simplified by the information provided by the
microprocessor controller: if an alarm is signalled, refer to the
control panel instruction manual.
FAULT
THE AIR-CONDITIONER DOESN'T START
ROOM TEMPERATURE
TOO HIGH
ROOM TEMPERATURE
TOO LOW
If required, contact the nearest service centre, indicating the
probable causes of the fault.
CAUSE
SOLUTION
The electrical panel is not powered
Check for voltage; close the main switch.
The auxiliary circuits are not powered
Check that the cutout IM in the auxiliary circuits is armed.
Check the fuse on the main board.
The control panel does not start the
air-conditioner.
Check for DC power.
The parameter settings on the microprocessor
controller are not correct.
See the controller manual.
The air flow-rate is too low or null.
See “LOW OR NO AIR FLOW”.
The probe isn't working.
Check the electrical connections and the
configuration of the controller.
Thermal load higher than expected.
Check the thermal load in the room being
air-conditioned.
The compressor/compressors don't start,
despite being activated by the controller.
See “THE COMPRESSOR/COMPRESSORS
DON'T START”.
The parameter settings on the
microprocessor controller are not correct.
See the controller manual.
The power of the heaters is not sufficient or
the heaters aren't working.
Check the flow-rate and the temperature of
the water hot.
Check the operation of the control valve
and the servomotor.
The hot water coil isn't working correctly.
The hot gas post-heating system isn't working
during the dehumidification plus post-heating
phase
64
EN
Check that the heater thermal cutout is armed.
Check the power supply to the electric heaters.
If the heater safety thermostat is activated,
resolve the causes and reset the alarm.
Check the operation of the hot gas three-way
valve;
Check the operation of the compressor used
for post-heating: in this case, see “THE
COMPRESSOR/COMPRESSORS DON'T
START”.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
FAULT
AMBIENT HUMIDITY
TOO HIGH
AMBIENT HUMIDITY
TOO LOW
CAUSE
The parameter settings on the
microprocessor controller are not correct.
See the controller manual.
Latent load higher than expected
Check and calculate the latent load; check the
flow-rate and the conditions of the outside air;
check the inflow of outside air.
The compressor isn't working during the
dehumidification phase.
See “THE COMPRESSOR/COMPRESSORS
DON'T START”.
The dehumidification valve doesn't close.
Check the operation of the solenoid valve that
controls the dehumidification circuit.
The control system isn't working.
See the controller manual; check the
operation of the panel and/or the probe.
The parameter settings on the microprocessor
controller are not correct.
Check the room temperature setting (see the
control panel manual).
Latent load lower than expected.
Verificare la consistenza del carico latente.
The humidifier isn't working.
LOW OR NO AIR
FLOW
SOLUTION
Check the pressure of the supply water;
Check the operation of the manual control system and the steam production unit (see the
control panel manual)
The control system isn't working.
See the control panel manual; check the
operation of the panel and/or the probe.
The fans are not powered.
Check the power supply to the fans.
The filters are blocked (possible activation of
the dirty filter alarm).
Clean the filter using a vacuum cleaner after
having shaken off the larger particles of dust.
Replace the filter if excessively clogged.
Check the correct calibration of the dirty filter
differential pressure switch F4.
Obstructions to the air flow.
See the paragraph on AIR DISTRIBUTION
The fan thermal cutout has tripped.
Check the resistance of the fan windings; after
resetting, measure the voltage and power
input.
EC radial fan speed set too low
Excessive pressure drop in the air distribution
system.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
Check the sizing of the air distribution system
(ducting, false-ceiling, underfloor plenum, grills)
EN
65
CAUSE
FAULT
HEATER SAFETY
THERMOSTAT
ACTIVATED
HIGH COMPRESSOR
DISCHARGE
PRESSURE
SOLUTION
Insufficient air flow-rate
See “LOW OR NO AIR FLOW”.
Thermostat connection wire cut or broken
Check the continuity of the connection from
the safety thermostat to the control system.
Faulty thermostat
Replace the heater safety thermostat.
A) Air or incondensable gas in the refrigerant
circuit, seen by the presence of bubbles, despite
measuring a high subcooling.
B) Insufficient air flow-rate to the remote heat
exchanger or air too hot
Excessive refrigerant charge; condenser
partially flooded. Excessive subcooling of the
liquid at the condenser outlet.
Valves on the high pressure side of the circuit
partially closed.
66
EN
Check the operation and the correct direction
of rotation of the fans on the outdoor heat
exchanger.
Check that the exchanger is not dirty and
remove any material that may be blocking it
(leaves, paper, seeds, dust, etc.) with a jet of
compressed air or with a brush;
Check the outdoor unit for any obstacles to
the flow of air and any recirculation of the cooling air;
Check that the temperature of the cooling air
does not exceed the design value.
Check the flow-rate, the pressure and the
temperature of the cooling water in the
closed circuit;
Check the calibration and the operation of the
pressure control valve.
Insufficient water flow-rate to the condenser
or water too hot.
HIGH PRESSURE
SWITCH ACTIVATED
(high compressor discharge pressure)
Empty and recharge the circuit.
Remove refrigerant from the circuit.
Check the opening of the valves.
The condensing pressure control system
isn't working.
Check the operation of the condenser fans
and the corresponding protection device;
repair or replace the faulty fans;
Check the calibration and the operation of the
remote condenser fan pressure switch or the
speed controller.
(See CONTROLLING THE CONDENSING
PRESSURE)
The system is affected by an excessive
discharge pressure
See “HIGH COMPRESSOR DISCHARGE
PRESSURE”.
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
FAULT
LOW COMPRESSOR
DISCHARGE
PRESSURE
CAUSE
The condensing pressure control system
isn't working (see the control panel manual).
Excessive water flow-rate to the condenser
or water too cold.
Suction pressure too low
HIGH COMPRESSOR
SUCTION PRESSURE
LOW COMPRESSOR
SUCTION PRESSURE
(and possible defrosting
of the coil)
Thermal load higher than expected
Check the calibration and the operation of the
condenser fan pressure switch or the speed
controller;
Check the temperature of the cooling water.
Check the calibration and the operation of the
pressure control valve (if fitted).
Install a pressure control valve to manage the
flow-rate of water according to the condensing pressure.
See “LOW COMPRESSOR SUCTION
PRESSURE”.
Check the ambient thermal load; check, above
all for intense dehumidification, the flow-rate
and the conditions of the outside air; check
the inflow of outside air.
The system is affected by an excessive
discharge pressure
See “HIGH COMPRESSOR DISCHARGE
PRESSURE”.
Too much refrigerant in the circuit.
Remove refrigerant from the circuit
Return of liquid refrigerant to the
compressor intake
Check that the thermostatic valve superheating value is correct; check that the valve sensor bulb is not discharged and that it is correctly positioned, secured and insulated”.a
Room temperature too low
See “ROOM TEMPERATURE TOO LOW”.
The air flow-rate is too low or null
See “LOW OR NO AIR FLOW”.
Liquid receiver outlet valve not
completely open
Check the opening of the valve.
Refrigerant filter blocked
LOW PRESSURE
SWITCH ACTIVATED
(low compressor suction
pressure)
SOLUTION
Check that the thermostatic valve superheating value is correct; check that the valve sensor bulb is not discharged and that it is correctly positioned, secured and insulated”.
Insufficient refrigerant charge
Check the liquid subcooling at the condenser
outlet; if necessary, restore the charge.
Thermostatic valve not correctly calibrated
or faulty
Check that the thermostatic valve superheating
value is correct (around 5°C).
Dewatering filter cartridge dirty
The system is affected by an excessively
low discharge pressure
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
Check and if necessary replace the dewatering
filter cartridge; the temperature difference
measured upstream and downstream of the
filter must be less than 2°C.
See “LOW COMPRESSOR DISCHARGE
PRESSURE”.
EN
67
COD. C01001614H_V4_03
Climaveneta S.p.A.
Via Sarson 57/c
36061 Bassano del Grappa (VI)
Italy
Tel +39 0424 509 500
Fax +39 0424 509 509
[email protected]
www.climaveneta.com
Climaveneta France
3, Village d’Entreprises
ZA de la Couronne des Prés
Avenue de la Mauldre
78680 Epône
France
Tel +33 (0) 1 30 95 19 19
Fax +33 (0) 1 30 95 18 18
[email protected]
www.climaveneta.fr
Climaveneta Deutschland GmbH
Lyrenstraße 13
44866 Bochum
Germany
Tel +49 2327-95428-0
Fax +49 2327-95428-99
[email protected]
www.climaveneta.de
Climaveneta España - Top Clima
Londres 67, 1 4
08036 Barcelona
Spain
Tel +34 934 195 600
Fax +34 934 195 602
[email protected]
www.climaveneta.com
Climaveneta Chat Union
Refrig. Equipment Co Ltd
88 Bai Yun Rd, Pudong Xinghuo
New dev. zone 201419 Shanghai
China
Tel 008 621 575 055 66
Fax 008 621 575 057 97
Climaveneta Polska Sp. z o.o.
Ul. Sienkiewicza 13A,
05-120 Legionowo,
Poland
Tel +48 22 766 34 55-57
Fax +48 22 784 39 09
[email protected]
www.climaveneta.pl
Climaveneta Climate Technologies (P) Ltd
#3487, 14th Main, HAL 2nd stage,
Indiranagar, Bangalore 560008
India
Tel:+91-80-42466900 - 949,
Fax: +91-80-25203540
[email protected]
Climaveneta Powermaster Ltd.
Unit 6, St Clare Business Park
Holly Road - Hampton Hill
Middlesex - TW12 1PZ
U.K.
Tel: +44 (0) 20 8783 1008
Fax: +44 (0) 20 8783 1009
[email protected]
www.climaveneta.co.uk
www.climaveneta.com
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